Indenture due 2011

INDENTURE dated as of April 25, 2006 between GILEAD SCIENCES, INC., a Delaware corporation (the “Company”), and WELLS FARGO BANK, NATIONAL ASSOCIATION, a national banking association, as trustee (“Trustee”).

Each party agrees as follows for the benefit of the other party and for the equal and ratable benefit of the Holders of the Company’s 0.50% Convertible Senior Notes due 2011 (the “Securities”):

“Additional Interest” means all additional interest owing on the Securities pursuant to the Registration Rights Agreement.

“Affiliate” of any specified person means any other person directly or indirectly controlling or controlled by or under direct or indirect common control with such specified person. For the purposes of this definition, “control” when used with respect to any specified person means the power to direct or cause the direction of the management and policies of such person, directly or indirectly, whether through the ownership of voting securities, by contract or otherwise; and the terms “controlling” and “controlled” have meanings correlative to the foregoing.

“Applicable Conversion Rate” means the Conversion Rate on any Trading Day, as adjusted in accordance with Article 10. For purposes of determining the Conversion Value, the Applicable Conversion Rate means the Conversion Rate on the Conversion Date.

“Applicable Procedures” means, with respect to any transfer or transaction involving a Global Security or beneficial interest therein, the rules and procedures of the Depositary for such Security, in each case to the extent applicable to such transaction and as in effect from time to time.

“Average Closing Price” means (1) with respect to distributions of rights, warrants or options, the average of the Closing Prices per share of Common Stock for the five (5) consecutive Trading Days ending on the date immediately preceding the first public announcement of the distribution and (2) with respect to other distributions, the average of the Closing Prices per share of Common Stock for the five (5) consecutive Trading Days ending on the date immediately preceding the Time of Determination.

If the Ex-Dividend Time (or in the case of a subdivision, combination or reclassification, the effective date with respect thereto) with respect to a dividend, subdivision, combination or reclassification to which Section 10.06(1) or (2) applies occurs during the period applicable for calculating “Average Closing Price” pursuant to the definition in the preceding sentence, “Average Closing Price” shall be calculated for such period in a manner determined by the Board of Directors to reflect the impact of such dividend, subdivision, combination or reclassification on the Closing Price of the Common Stock during such period.

“Bankruptcy Law” means Title 11, United States Code, or any similar Federal or state law for the relief of debtors.

“Board of Directors” means either the board of directors of the Company or any duly authorized committee of such board.

“Business Day” means any weekday that is not a day on which banking institutions in the City of New York, New York are authorized or obligated to close.

“Capital Stock” for any corporation means any and all shares, interests, rights to purchase, warrants, options, participations or other equivalents of or interests in (however designated) stock issued by that corporation.

“Certificated Securities” means Securities that are substantially in the form of the Securities attached hereto as Exhibit A.

A “Change in Control” shall be deemed to have occurred at such time as either of the following events shall occur:

(1) any person or group, other than the Company, its Subsidiaries or any employee benefits plan of the Company or its Subsidiaries, files a Schedule 13D or Schedule TO (or any successor schedule, form or report) pursuant to the Exchange Act, disclosing that such person has become the beneficial owner of 50% or more of the voting power of the Common Stock then outstanding or other Capital Stock into which the Common Stock is reclassified or changed; provided, however, that a person shall not be deemed beneficial owner of, or to own beneficially, (A) any securities tendered pursuant to a tender or exchange offer made by or on behalf of such person or any of such person’s Affiliates until such tendered securities are accepted for purchase or exchange thereunder, or (B) any securities if such beneficial ownership (1) arises solely as a result of a revocable proxy delivered in response to a proxy or consent solicitation made pursuant to the applicable rules and regulations under the Exchange Act, and (2) is not also then reportable on Schedule 13D (or any successor schedule) under the Exchange Act; or

(2) the Company consolidates with or merges with or into another person (other than a Subsidiary of the Company), or sells, conveys, transfers or leases all or substantially all of its properties and assets to any person (other than a Subsidiary of the Company) or any person (other than a Subsidiary of the Company) consolidates with or merges with or into the Company, and the outstanding Voting Stock of the Company is reclassified into, converted for or converted into the right to receive any other property or security, provided that none of these circumstances will be a Change in Control if the persons that beneficially own the Voting Stock of the Company immediately prior to the transaction own, directly or indirectly, shares with a majority of the total voting power of all outstanding Voting Stock of the surviving or transferee person that are entitled to vote generally in the election of that person’s board of directors, managers or trustees immediately after the transaction.

(x) the term “person” and the term “group” have the meanings given by Section 13(d) and 14(d) of the Exchange Act or any successor provisions;

(y) the term “group” includes any group acting for the purpose of acquiring, holding or disposing of securities within the meaning of Rule 13d-5(b)(1) under the Exchange Act or any successor provision; and

(z) the term “beneficial owner” is determined in accordance with Rules 13d-3 and 13d-5 under the Exchange Act or any successor provisions, except that a person will be deemed to have beneficial ownership of all shares that person has the right to acquire irrespective of whether that right is exercisable immediately or only after the passage of time.

Notwithstanding the foregoing, it will not constitute a Change in Control if at least 90% of the consideration for the Common Stock (excluding cash payments for fractional shares and cash payments made in respect of dissenter’s appraisal rights and cash payment of the Required Cash Amount, if any) in the transaction or transactions constituting the Change in Control consists of common stock traded on a United States national securities exchange or quoted on The Nasdaq National Market, or which will be so traded or quoted when exchanged in connection with the Change in Control, and as a result of such transaction or transactions the Securities become convertible solely into such common stock.

“Closing Price” of the Common Stock on any date means the closing per share sale price (or, if no closing sale price is reported, the average of the bid and ask prices or, if more than one in either case, the average of the average bid and average ask prices) on such date as reported in composite transactions for the principal United States securities exchange on which the Common Stock is traded or, if the Common Stock is not listed on a United States national or regional securities exchange, (i) as reported by the National Association of Securities Dealers Automated Quotation System or by the National Quotation Bureau Incorporated, or (ii) if such bid and ask prices are not reported by the National Association of Securities Dealers Automated Quotation System or by the National Quotation Bureau Incorporated, in a manner to be determined by the Company on the basis of such quotation as the Company considers appropriate in its sole and absolute discretion.

“Common Stock” means the shares of common stock, $0.001 par value, of the Company as it exists on the date of this Indenture or any other shares of Capital Stock of the Company into which the Common Stock shall be reclassified or changed.

“Company” means the party named as the “Company” in the first paragraph of this Indenture until a successor replaces it pursuant to the applicable provisions of this Indenture and, thereafter, shall mean such successor. The foregoing sentence shall likewise apply to any subsequent such successor or successors.

“Company Request” or “Company Order” means a written request or order signed in the name of the Company by an Officer.

“Conversion Date” means the date on which the Holder of the Security has complied with all requirements under this Indenture to convert such Security.

“Conversion Price” per share of Common Stock as of any day means the result obtained by dividing $1,000 by the then Applicable Conversion Rate.

“Conversion Rate” means the number of shares of Common Stock issuable upon conversion of a Security per $1,000 of Principal Amount thereof, subject to adjustment pursuant to Article 10.

“Conversion Reference Period” means (a) for Securities that are converted during the period beginning on the 30^th day prior to the Maturity Date, the ten consecutive Trading Days beginning on the third Trading Day following the Maturity Date and (b) in all other instances, the ten consecutive Trading Days beginning on the third Trading Day following the Conversion Date.

“Conversion Value” means the amount equal to the product of (a) the Applicable Conversion Rate multiplied by (b) the average of the Volume Weighted Average Price on each of the Trading Days during the Conversion Reference Period.

“Corporate Trust Office” means the principal office of the Trustee at which at any time its corporate trust business shall be administered, which office at the date hereof is located at 213 Court Street, Middletown, CT 06457, Attention: Corporate Trust Services, or such other address as the Trustee may designate from time to time by notice to the Holders and the Company, or the principal corporate trust office of any successor Trustee (or such other address as a successor Trustee may designate from time to time by notice to the Holders and the Company).

“Custodian” means any receiver, trustee, assignee, liquidator, custodian or similar official under any Bankruptcy Law.

“Daily Share Amounts” means, for each Trading Day of the Conversion Reference Period and each $1,000 Principal Amount of Securities surrendered for conversion, a number of shares of Common Stock (but in no event less than zero) determined by the following formula:

“Default” means any event which is, or after notice or passage of time or both would be, an Event of Default.

“Depositary” means DTC or the nominee thereof, or any successor thereto.

“Global Securities” means Securities that are in the form of the Securities attached hereto as Exhibit A.

“Holder” means a person in whose name a Security is registered on the Registrar’s books.

“Indebtedness” means with respect to the Company at any date, without duplication, obligations (other than nonrecourse obligations) for borrowed money or evidenced by bonds, debentures, notes or similar instruments.

“Indenture” means this Indenture, as amended or supplemented from time to time in accordance with the terms hereof, including the provisions of the TIA that are deemed to be a part hereof.

“Initial Conversion Rate” means 12.9024 shares of Common Stock per Principal Amount of $1,000, subject to adjustment pursuant to Article 10.

“Interest Payment Date” means each date specified as such in paragraph 1 of the Securities.

“Issue Date” of any Security means the date on which the Security was originally issued or deemed issued as set forth on the face of the Security.

“Market Disruption Event” means the occurrence or existence for more than one half hour period in the aggregate on any scheduled Trading Day for the Common Stock of any suspension or limitation imposed on trading (by reason of movements in price exceeding limits permitted by the Nasdaq National Market or otherwise) in Common Stock or in any options, contracts or future contracts relating to the Common Stock, and such suspension or limitation occurs or exists at any time before 1:00 p.m. (New York City time) on such day.

“Net Share Amount” means (i) the Remaining Shares after giving effect to any election by the Company to pay cash in lieu of all or a portion thereof pursuant to Section 10.01 and (ii) any such cash.

“Officer” means the Chairman of the Board, the Vice Chairman, the Chief Executive Officer, the President, any Executive Vice President, any Senior Vice President, any Vice President, the Treasurer or the Secretary or any Assistant Treasurer or Assistant Secretary of the Company.

“Officers’ Certificate” means a written certificate containing the information specified in Sections 12.04 and 12.05, signed in the name of the Company by any two Officers, and delivered to the Trustee. One of the officers executing the Officers’ Certificate pursuant to Section 4.03 shall be the principal executive officer, financial officer or accounting officer of the Company.

“Opinion of Counsel” means a written opinion containing the information specified in Sections 12.04 and 12.05, from legal counsel who is acceptable to the Trustee. The counsel may be an employee of, or counsel to, the Company or the Trustee.

“Person” or “person” means any individual, corporation, limited liability company, partnership, joint venture, association, joint-stock company, trust, unincorporated organization, or government or any agency or political subdivision thereof.

“Principal Amount” of a Security means the Principal Amount as set forth on the face of the Security.

“Registration Rights Agreement” means the Registration Rights Agreement, dated as of the date hereof, by and among the Company and Merrill Lynch, Pierce, Fenner & Smith Incorporated, Morgan Stanley & Co. Incorporated and Banc of America Securities LLC, as representatives of the Initial Purchasers.

“Regular Record Date” means, with respect to any Interest Payment Date, the April 15 or the October 15 immediately preceding such Interest Payment Date.

“Responsible Officer” means, when used with respect to the Trustee, any officer within the corporate trust department of the Trustee having direct responsibility for the administration of this Indenture.

“Restricted Global Security” means a Global Security that is a Restricted Security.

“Rule 144” means Rule 144 under the Securities Act or any successor to such Rule.

“Rule 144A” means Rule 144A under the Securities Act or any successor to such Rule.

“Securities” means any of the Company’s 0.50% Convertible Senior Notes due 2011, as amended or supplemented from time to time, issued under this Indenture.

“Significant Subsidiary” means a “significant subsidiary”, as such term is defined in Rule 1-02 of Regulation S-X under the Securities Act of 1933.

“Stated Maturity,” when used with respect to any Security or any installment of interest thereon, means the date specified in such Security as the fixed date on which an amount equal to the Principal Amount of such Security or such installment of interest is due and payable.

“Subsidiary” means (i) a corporation, a majority of whose Voting Stock is, at the date of determination, directly or indirectly owned by the Company, by one or more Subsidiaries of the Company, or by the Company and one or more Subsidiaries of the Company, (ii) a partnership in

which the Company, a Subsidiary of the Company or the Company and one or more Subsidiaries of the Company, holds a majority interest in the equity capital or profits of such partnership, or (iii) any other person (other than a corporation or a partnership) in which the Company, a Subsidiary of the Company, or the Company and one or more Subsidiaries of the Company, directly or indirectly, at the date of determination, has (x) at least a majority ownership interest or (y) the power to elect or direct the election of a majority of the directors or trustees, as the case may be, or other governing body of such person.

“TIA” means the Trust Indenture Act of 1939 as in effect on the date of this Indenture, provided, however, that in the event the TIA is amended after such date, TIA means, to the extent required by any such amendment, the TIA as so amended.

“Time of Determination” means the time and date of the earlier of (i) the determination of stockholders entitled to receive rights, warrants or options or a distribution, in each case, to which Sections 10.07, 10.08 or 10.10 applies and (ii) the time (“Ex-Dividend Time”) immediately prior to the commencement of “ex-dividend” trading for such rights, warrants or options or distribution on the Nasdaq National Market or such other national or regional exchange or market on which the Common Stock is then listed or quoted.

“Trading Day” means any day on which (i) there is no Market Disruption Event and (ii) the Nasdaq National Market or, if the Common Stock is not quoted on the Nasdaq National Market, the principal national securities exchange on which the Common Stock is listed, is open for trading or, if the Common Stock is not so listed, admitted for trading or quoted, any Business Day. A Trading Day only includes those days that have a scheduled closing time of 4:00 p.m. (New York City time) or the then standard closing time for regular trading on the relevant exchange or trading system.

“Trustee” means the party named as the “Trustee” in the first paragraph of this Indenture until a successor replaces it pursuant to the applicable provisions of this Indenture and, thereafter, shall mean such successor. The foregoing sentence shall likewise apply to any subsequent such successor or successors.

“Volume Weighted Average Price” means the price per share of the Common Stock on any Trading Day as displayed on Bloomberg (or any successor service) page GILD <equity> VAP in respect of the period from 9:30 a.m. to 4:00 p.m. (New York City time), on such Trading Day; or, if such price is not available, the market value per share of the Common Stock on such day as determined by a nationally recognized independent investment banking firm retained for this purpose by the Company.

“Voting Stock” means, with respect to any corporation, association, company or business trust, stock or other securities of the class or classes having general voting power under ordinary circumstances to elect at least a majority of the board of directors, managers or trustees of such corporation, association, company or business trust, provided that, for the purposes hereof, stock or other securities which carry only the right to vote conditionally on the happening of an event shall not be considered Voting Stock whether or not such event shall have happened.

Whenever this Indenture refers to a provision of the TIA, the provision is incorporated by reference in and made a part of this Indenture. The following TIA terms used in this Indenture have the following meanings:

“indenture trustee” or “institutional trustee” means the Trustee.

All other TIA terms used in this Indenture that are defined by the TIA, defined by TIA reference to another statute or defined by SEC rule have the meanings assigned to them by such definitions.

(ii) an accounting term not otherwise defined has the meaning assigned to it in accordance with United States generally accepted accounting principles as in effect from time to time;

(v) words in the singular include the plural, and words in the plural include the singular.

Any request, demand, authorization, direction, notice, consent, waiver or other action provided by this Indenture to be given or taken by Holders may be embodied in and evidenced by one or more instruments (which may take the form of an electronic writing or messaging or otherwise be in accordance with customary procedures of the Depositary or the Trustee) of substantially similar tenor signed by such Holders in person or by agent duly appointed in writing (which may be in electronic form); and, except as herein otherwise expressly provided, such action shall become effective when such instrument or instruments are delivered to the Trustee and, where it is hereby expressly required, to the Company. Such instrument or instruments (and the action embodied therein and evidenced thereby) are herein sometimes referred to as the “Act” of Holders signing such instrument or instruments. Proof of execution of any such instrument or of a writing appointing any such agent (either of which may be in electronic form) shall be sufficient for any purpose of this Indenture and conclusive in favor of the Trustee and the Company, if made in the manner provided in this Section.

(i) The fact and date of the execution by any Person of any such instrument or writing may be proved by the affidavit of a witness of such execution (or electronic delivery) or by a certificate of a notary public or other officer authorized by law to take acknowledgments of

deeds, certifying that the individual signing or delivering such instrument or writing acknowledged to such officer the execution thereof (or electronic delivery). Where such execution is by a signer acting in a capacity other than such signer’s individual capacity, such certificate or affidavit shall also constitute sufficient proof of such signer’s authority. The fact and date of the execution of any such instrument or writing (electronic or otherwise), or the authority of the Person executing the same, may also be proved in any other manner which the Trustee deems sufficient.

(ii) The ownership of Securities shall be proved by the register for the Securities maintained by the Registrar.

(iii) Any request, demand, authorization, direction, notice, consent, waiver or other Act of the Holder of any Security shall bind every future Holder of the same Security and the holder of every Security issued upon the registration of transfer thereof or in exchange therefor or in lieu thereof in respect of anything done, omitted or suffered to be done by the Trustee or the Company in reliance thereon, whether or not notation of such action is made upon such Security.

(iv) If the Company shall solicit from the Holders any request, demand, authorization, direction, notice, consent, waiver or other Act, the Company may, at its option, by or pursuant to a resolution of the Board of Directors, fix in advance a record date for the determination of Holders entitled to give such request, demand, authorization, direction, notice, consent, waiver or other Act, but the Company shall have no obligation to do so. If such a record date is fixed, such request, demand, authorization, direction, notice, consent, waiver or other Act may be given before or after such record date, but only the Holders of record at the Close of Business on such record date shall be deemed to be Holders for the purposes of determining whether Holders of the requisite proportion of outstanding Securities have authorized or agreed or consented to such request, demand, authorization, direction, notice, consent, waiver or other Act, and for that purpose the outstanding Securities shall be computed as of such record date; provided that no such authorization, agreement or consent by the Holders on such record date shall be deemed effective unless it shall become effective pursuant to the provisions of this Indenture not later than six months after the record date.

The Securities and the Trustee’s certificate of authentication shall be substantially in the form of Exhibit A, which is a part of this Indenture. The Securities may have notations, legends or endorsements required by law, stock exchange rule or usage (provided that any such notation, legend or endorsement required by usage is in a form acceptable to the Company). The Company shall provide any such notations, legends or endorsements to the Trustee in writing. Each Security shall be dated the date of its authentication. The Securities are being offered and sold by the Company pursuant to a Purchase Agreement, dated April 19, 2006 (the “Purchase Agreement”), by and among the Company and Merrill Lynch, Pierce, Fenner & Smith Incorporated, Morgan Stanley & Co. Incorporated and Banc of America Securities LLC, as

representatives on behalf of the initial purchasers named in Schedule A thereto (collectively, the “Initial Purchasers”), in transactions exempt from, or not subject to, the registration requirements of the Securities Act.

(i) Restricted Global Securities. All of the Securities are initially being offered and sold to qualified institutional buyers as defined in Rule 144A in reliance on Rule 144A under the Securities Act and shall be issued initially in the form of one or more Restricted Global Securities, which shall be deposited on behalf of the purchasers of the securities represented thereby with the Trustee, at its Corporate Trust Office, as custodian for the Depositary, and registered in the name of its nominee, Cede & Co. (or any successor thereto), for the accounts of participants in the Depositary, duly executed by the Company and authenticated by the Trustee as hereinafter provided.

(ii) Global Securities in General. Each Global Security shall represent such of the outstanding Securities as shall be specified therein and each shall provide that it shall represent the aggregate Principal Amount of outstanding Securities from time to time endorsed thereon and that the aggregate Principal Amount of outstanding Securities represented thereby may from time to time be reduced or increased, as appropriate, to reflect exchanges, redemptions and conversions. Except as provided in this Section 2.01 or Sections 2.06 or 2.12, owners of beneficial interests in Global Securities will not be entitled to receive physical delivery of Certificated Securities.

Any adjustment of the aggregate Principal Amount of a Global Security to reflect the amount of any increase or decrease in the Principal Amount of outstanding Securities represented thereby shall be made by the Trustee in accordance with instructions given by the Holder thereof as required by Section 2.12 hereof and shall be made on the records of the Trustee and the Depositary, subject in each case to compliance with Applicable Procedures.

(iii) Book-Entry Provisions. This Section 2.01(c) shall apply only to Global Securities deposited with or on behalf of the Depositary.

The Company shall execute and the Trustee shall, in accordance with this Section 2.01(c), authenticate and deliver initially one or more Global Securities that (a) shall be registered in the name of the Depositary, (b) shall be delivered by the Trustee to the Depositary or pursuant to the Depositary’s instructions and (c) shall bear legends substantially to the following effect:

“UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY TO THE ISSUER OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY (AND ANY PAYMENT HEREON IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL

TRANSFERS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS, IN WHOLE BUT NOT IN PART, TO NOMINEES OF THE DEPOSITORY TRUST COMPANY OR TO A SUCCESSOR THEREOF OR SUCH SUCCESSOR’S NOMINEE AND TRANSFERS OF PORTIONS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS MADE IN ACCORDANCE WITH THE RESTRICTIONS SET FORTH IN ARTICLE TWO OF THE INDENTURE REFERRED TO ON THE REVERSE HEREOF.”

(iv) Certificated Securities. Securities not issued as interests in the Global Securities will be issued in certificated form substantially in the form of Exhibit A attached hereto.

(i) The Securities shall be executed on behalf of the Company by any Officer. The signature of the Officer on the Securities may be manual or facsimile.

(ii) Securities bearing the manual or facsimile signatures of an individual who was at the time of the execution of the Securities the proper Officer of the Company shall bind the Company, notwithstanding that such individual has ceased to hold such office prior to the authentication and delivery of such Securities or did not hold such office at the date of authentication of such Securities.

(iii) No Security shall be entitled to any benefit under this Indenture or be valid or obligatory for any purpose unless there appears on such Security a certificate of authentication substantially in the form provided for herein duly executed by the Trustee by manual signature of an authorized officer of the Trustee, and such certificate upon any Security shall be conclusive evidence, and the only evidence, that such Security has been duly authenticated and delivered hereunder.

(iv) Subject to the terms of Section 12.04 and 12.05 hereof, the Trustee shall authenticate and deliver Securities for original issue in an aggregate Principal Amount of up to $650,000,000 (subject to Section 2.07 hereof) upon a Company Order without any further action by the Company. The aggregate Principal Amount of Securities outstanding at any time may not exceed the amount set forth in the foregoing sentence, except as provided in Section 2.07.

(v) The Securities shall be issued only in registered form without coupons and only in denominations of $1,000 of Principal Amount and any integral multiple thereof.

(vi) The Trustee shall have the right to decline to authenticate and deliver any Securities under this Section if the Trustee, being advised by counsel, determines that such action may not be lawfully taken or if the Trustee in good faith shall determine that such action would expose the Trustee to personal liability to existing Holders.

(i) The Company shall maintain an office or agency where Securities may be presented for registration of transfer or for exchange for other Securities (“Registrar”), an office or agency where Securities may be presented for purchase or payment (“Paying Agent”) and an office or agency where Securities may be presented for conversion into Common Stock (“Conversion Agent”). The Registrar shall keep a register of the Securities and of their registration of transfer and exchange. The Company may have one or more co-registrars, one or more additional paying agents and one or more additional conversion agents. The term Paying Agent includes any additional paying agent, including any named pursuant to Section 4.04. The term Conversion Agent includes any additional conversion agent, including any named pursuant to Section 4.04.

(ii) The Company shall enter into an appropriate agency agreement with any Registrar or co-registrar, Paying Agent or Conversion Agent (other than the Trustee). The agreement shall implement the provisions of this Indenture that relate to such agent. The Company shall notify the Trustee of the name and address of any such agent. If the Company fails to maintain a Registrar, Paying Agent or Conversion Agent, the Trustee shall act as such and shall be entitled to appropriate compensation therefor pursuant to Section 7.07. The Company or any Subsidiary or an Affiliate of either of them may act as Paying Agent, Registrar, Conversion Agent or co-registrar.

(iii) The Company initially appoints the Trustee as Registrar, Conversion Agent and Paying Agent in connection with the Securities.

Except as otherwise provided herein, by no later than 10:00 a.m., New York City time, on or prior to each due date of payments in respect of any Security, the Company shall deposit with the Paying Agent a sum of money (in immediately available funds if deposited on the due date) or Common Stock sufficient to make such payments when so becoming due. The Company shall require each Paying Agent (other than the Trustee) to agree in writing that the Paying Agent shall hold in trust for the benefit of Holders or the Trustee all money and Common Stock held by the Paying Agent for the making of payments in respect of the Securities and shall notify the Trustee of any default by the Company in making any such payment. At any time during the continuance of any such default, the Paying Agent shall, upon the written request of the Trustee, forthwith pay to the Trustee all money and Common Stock so held in trust. If the Company or a Subsidiary or an Affiliate of either of them acts as Paying Agent, it shall segregate the money and Common Stock held by it as Paying Agent and hold it as a separate trust fund. The Company at any time may require a Paying Agent to pay all money and Common Stock held by it to the Trustee and to account for any funds and Common Stock disbursed by it. Upon doing so, the Paying Agent shall have no further liability for the money or Common Stock.

The Trustee shall preserve in as current a form as is reasonably practicable the most recent list available to it of the names and addresses of Holders. If the Trustee is not the

Registrar, the Company shall cause to be furnished to the Trustee at least semiannually on June 1 and December 1 a listing of Holders dated within 15 days of the date on which the list is furnished and at such other times as the Trustee may request in writing a list in such form and as of such date as the Trustee may reasonably require of the names and addresses of Holders.

(i) upon surrender for registration of transfer of any Security, together with a written instrument of transfer satisfactory to the Registrar duly executed by the Holder or such Holder’s attorney duly authorized in writing, at the office or agency of the Company designated as Registrar or co-registrar pursuant to Section 2.03, the Company shall execute, and the Trustee upon receipt of a Company Order shall authenticate and deliver, in the name of the designated transferee or transferees, one or more new Securities of any authorized denomination or denominations, of a like aggregate Principal Amount. The Company shall not charge a service charge for any registration of transfer or exchange, but the Company or the Trustee may require payment of a sum sufficient to pay all taxes, assessments or other governmental charges that may be imposed in connection with the registration of transfer or exchange of the Securities from the Holder requesting such registration of transfer or exchange.

At the option of the Holder, Certificated Securities may be exchanged for other Securities of any authorized denomination or denominations, of a like aggregate Principal Amount, upon surrender of the Securities to be exchanged, together with a written instrument of transfer satisfactory to the Registrar duly executed by the Holder or such Holder’s attorney duly authorized in writing, at such office or agency. Whenever any Securities are so surrendered for exchange, the Company shall execute, and the Trustee upon receipt of a Company Order shall authenticate and deliver, the Securities which the Holder making the exchange is entitled to receive.

The Company shall not be required to make, and the Registrar need not register, any Securities in respect of which a Change in Control Purchase Notice has been given and not withdrawn by the Holder thereof in accordance with the terms of this Indenture (except, in the case of Securities to be purchased in part, the portion thereof not to be purchased).

(ii) Notwithstanding any provision to the contrary herein, so long as a Global Security remains outstanding and is held by or on behalf of the Depositary, transfers of a Global Security, in whole or in part, shall be made only in accordance with Section 2.12 and this Section 2.06(b). Transfers of a Global Security shall be limited to transfers of such Global Security in whole, or in part, to nominees of the Depositary or to a successor of the Depositary or such successor’s nominee.

(iii) Successive registrations and registrations of transfers and exchanges as aforesaid may be made from time to time as desired, and each such registration shall be noted on the register for the Securities.

(iv) Any Registrar appointed pursuant to Section 2.03 hereof shall provide to the Trustee such information as the Trustee may reasonably require in connection with the delivery by such Registrar of Securities upon registration of transfer or exchange of Securities.

(v) No Registrar shall be required to make registrations of transfer or exchange of Securities during any periods designated in the text of the Securities or in this Indenture as periods during which such registration of transfers and exchanges need not be made.

(i) If (A) any mutilated Security is surrendered to the Trustee, or (B) the Company and the Trustee receive evidence to their satisfaction of the destruction, loss or theft of any Security, and there is delivered to the Company and the Trustee such security or indemnity as may be required by them to save each of them harmless, then, in the absence of notice to the Company or the Trustee that such Security has been acquired by a protected purchaser within the meaning of Article 8 of the Uniform Commercial Code as in effect from time to time in the State of New York (a “Protected Purchaser”), the Company shall execute and upon a Company Request the Trustee shall authenticate and deliver, in exchange for any such mutilated Security or in lieu of any such destroyed, lost or stolen Security, a new Security of like tenor and Principal Amount, bearing a number not contemporaneously outstanding.

(ii) In case any such mutilated, destroyed, lost or stolen Security has become or is about to become due and payable, or is about to be purchased by the Company pursuant to Article 3 hereof, the Company in its discretion may, instead of issuing a new Security, pay or purchase such Security, as the case may be.

(iii) Upon the issuance of any new Securities under this Section, the Company may require the payment of a sum sufficient to cover any tax or other governmental charge that may be imposed in relation thereto and any other expenses (including the fees and expenses of the Trustee) connected therewith.

(iv) Every new Security issued pursuant to this Section in lieu of any mutilated, destroyed, lost or stolen Security shall constitute an original additional contractual obligation of the Company, whether or not the mutilated, destroyed, lost or stolen Security shall be at any time enforceable by anyone, and shall be entitled to all benefits of this Indenture equally and proportionately with any and all other Securities duly issued hereunder.

(v) The provisions of this Section are exclusive and shall preclude (to the extent lawful) all other rights and remedies with respect to the replacement or payment of mutilated, destroyed, lost or stolen Securities.

(i) Securities outstanding at any time are all the Securities authenticated by the Trustee except for those cancelled by it, those paid pursuant to Section 2.07 and delivered to it for cancellation and those described in this Section 2.08 as not outstanding. A Security does not cease to be outstanding because the Company or an Affiliate thereof holds the Security;

provided, however, that in determining whether the Holders of the requisite Principal Amount of Securities have given or concurred in any request, demand, authorization, direction, notice, consent or waiver hereunder, Securities owned by the Company or any other obligor upon the Securities or any Affiliate of the Company or such other obligor shall be disregarded and deemed not to be outstanding, except that, in determining whether the Trustee shall be protected in relying upon any such request, demand, authorization, direction, notice, consent or waiver, only Securities which a Responsible Officer of the Trustee actually knows to be so owned shall be so disregarded. Subject to the foregoing, only Securities outstanding at the time of such determination shall be considered in any such determination (including, without limitation, determinations pursuant to Articles 6 and 9).

(ii) If a Security is replaced pursuant to Section 2.07, the replaced Security ceases to be outstanding unless the Trustee and the Company receive proof satisfactory to each of them that the replaced Security is held by a Protected Purchaser.

(iii) If the Paying Agent holds, in accordance with this Indenture, on a Change in Control Purchase Date, or on Stated Maturity, money or securities, if permitted hereunder, sufficient to pay Securities payable on that date, then immediately after such Change in Control Purchase Date or Stated Maturity, as the case may be, such Securities shall cease to be outstanding and interest on such Securities shall cease to accrue whether or not the Security is delivered to the Paying Agent.

(iv) If a Security is converted in accordance with Article 10, then from and after the time of conversion on the Conversion Date, such Security shall cease to be outstanding and interest shall cease to accrue on such Security.

(i) Pending the preparation of definitive Securities, the Company may execute, and the Trustee upon receipt of a Company Order shall authenticate and deliver, temporary Securities which are printed, lithographed, typewritten, mimeographed or otherwise produced, in any authorized denomination, substantially of the tenor of the definitive Securities in lieu of which they are issued and with such appropriate insertions, omissions, substitutions and other variations as the officers executing such Securities may determine, as conclusively evidenced by their execution of such Securities.

(ii) If temporary Securities are issued, the Company will cause definitive Securities to be prepared without unreasonable delay. After the preparation of definitive Securities, the temporary Securities shall be exchangeable for definitive Securities upon surrender of the temporary Securities at the office or agency of the Company designated for such purpose pursuant to Section 2.03, without charge to the Holder. Upon surrender for cancellation of any one or more temporary Securities, the Company shall execute and the Trustee upon receipt of a Company Order shall authenticate and deliver in exchange therefor a like Principal Amount of definitive Securities of authorized denominations. Until so exchanged the temporary Securities shall in all respects be entitled to the same benefits under this Indenture as definitive Securities.

All Securities surrendered for payment, purchased by the Company pursuant to Article 3, conversion or registration of transfer or exchange shall, if surrendered to any person other than the Trustee, be delivered to the Trustee and shall be promptly cancelled by it. The Company may at any time deliver to the Trustee for cancellation any Securities previously authenticated and delivered hereunder which the Company may have acquired in any manner whatsoever, and all Securities so delivered shall be promptly cancelled by the Trustee. The Company may not issue new Securities to replace Securities it has paid or delivered to the Trustee for cancellation or that any Holder has converted pursuant to Article 10. No Securities shall be authenticated in lieu of or in exchange for any Securities cancelled as provided in this Section, except as expressly permitted by this Indenture. All cancelled Securities held by the Trustee shall be disposed of by the Trustee in accordance with the Trustee’s customary procedure.

Prior to due presentment of a Security for registration of transfer, the Company, the Trustee and any agent of the Company or the Trustee may treat the Person in whose name such Security is registered as the owner of such Security for the purpose of receiving payment of principal of the Security or the payment of any Change in Control Purchase Price in respect thereof, and interest thereon, for the purpose of conversion and for all other purposes whatsoever, whether or not such Security be overdue, and neither the Company, the Trustee nor any agent of the Company or the Trustee shall be affected by notice to the contrary.

(i) If Securities are issued upon the transfer, exchange or replacement of Securities subject to restrictions on transfer and bearing the legends set forth in Section 2.12(f) (collectively, the “Legend”), or if a request is made to remove the Legend on a Security, the Securities so issued shall bear the Legend, or the Legend shall not be removed, as the case may be, unless there is delivered to the Company and the Registrar such satisfactory evidence, which shall include an Opinion of Counsel, as may be reasonably required by the Company and the Registrar, that neither the Legend nor the restrictions on transfer set forth therein are required to ensure that transfers thereof comply with the provisions of Rule 144A or Rule 144 under the Securities Act or that such Securities are not “restricted” within the meaning of Rule 144 under the Securities Act; provided that no such evidence need be supplied in connection with the sale of such Security pursuant to a registration statement that is effective at the time of such sale. Upon (A) provision of such satisfactory evidence if requested, or (B) notification by the Company to the Trustee and Registrar of the sale of such Security pursuant to a registration statement that is effective at the time of such sale, the Trustee, upon Company Order, shall authenticate and deliver a Security that does not bear the Legend. If the Legend is removed from the face of a Security and the Security is subsequently held by an Affiliate of the Company, the Legend shall be reinstated.

(ii) Subject to Section 2.12(c)(i) and in compliance with Section 2.12(d), every Security shall be subject to the restrictions on transfer provided in the Legend. Whenever any Restricted Security other than a Restricted Global Security is presented or surrendered for

registration of transfer or in exchange for a Security registered in a name other than that of the Holder, such Security must be accompanied by a certificate in substantially the form set forth in Exhibit A, dated the date of such surrender and signed by the Holder of such Security, as to compliance with such restrictions on transfer. The Registrar shall not be required to accept for such registration of transfer or exchange any Security not so accompanied by a properly completed certificate.

(iii) Notwithstanding any other provisions of this Indenture or the Securities, (A) transfers of a Global Security, in whole or in part, shall be made only in accordance with Section 2.06 and Section 2.12(c)(i), (B) transfer of a beneficial interest in a Global Security for a Certificated Security shall comply with Section 2.06 and Section 2.12(c)(ii) below, and (C) transfers of a Certificated Security shall comply with Section 2.06 and Section 2.12(c)(iii) and (iv) below.

(A) Transfer of Global Security. A Global Security may not be transferred, in whole or in part, to any Person other than the Depositary or a nominee or any successor thereof, and no such transfer to any such other Person may be registered; provided that this clause (i) shall not prohibit any transfer of a Security that is issued in exchange for a Global Security but is not itself a Global Security. No transfer of a Security to any Person shall be effective under this Indenture or the Securities unless and until such Security has been registered in the name of such Person. Nothing in this Section 2.12(c)(i) shall prohibit or render ineffective any transfer of a beneficial interest in a Global Security effected in accordance with the other provisions of this Section 2.12(c).

(B) Restrictions on Transfer of a Beneficial Interest in a Global Security for a Certificated Security. A beneficial interest in a Global Security may not be exchanged for a Certificated Security except upon satisfaction of the requirements set forth below. Upon receipt by the Trustee of a request for transfer of a beneficial interest in a Global Security in accordance with Applicable Procedures for a Certificated Security in the form satisfactory to the Trustee, together with written instructions to the Trustee to make, or direct the Registrar to make, an adjustment on its books and records with respect to such Global Security to reflect a decrease in the aggregate Principal Amount of the Securities represented by the Global Security, such instructions to contain information regarding the Depositary account to be credited with such decrease, then the Trustee shall cause, or direct the Registrar to cause, in accordance with the standing instructions and procedures existing between the Depositary and the Registrar, the aggregate Principal Amount of Securities represented by the Global Security to be decreased by the aggregate Principal Amount of the Certificated Security to be issued, shall authenticate and deliver such Certificated Security and shall debit or cause to be debited to the account of the Person specified in such instructions a beneficial interest in the Global Security equal to the Principal Amount of the Certificated Security so issued.

(C) Transfer and Exchange of Certificated Securities. When Certificated Securities are presented to the Registrar with a request:

(y) to exchange such Certificated Securities for an equal Principal Amount of Certificated Securities of other authorized denominations,

the Registrar shall register the transfer or make the exchange as requested if its reasonable requirements for such transaction are met; provided, however, that the Certificated Securities surrendered for registration of transfer or exchange shall be duly endorsed or accompanied by a written instrument of transfer in form reasonably satisfactory to the Company and the Registrar, duly executed by the Holder thereof or his attorney duly authorized in writing.

(D) Restrictions on Transfer of a Certificated Security for a Beneficial Interest in a Global Security. A Certificated Security may not be exchanged for a beneficial interest in a Global Security except upon satisfaction of the requirements set forth below.

Upon receipt by the Trustee of a Certificated Security, duly endorsed or accompanied by appropriate instruments of transfer, in form satisfactory to the Trustee, together with written instructions directing the Trustee to make, or to direct the Registrar to make, an adjustment on its books and records with respect to such Global Security to reflect an increase in the aggregate Principal Amount of the Securities represented by the Global Security, such instructions to contain information regarding the Depositary account to be credited with such increase, then the Trustee shall cancel such Certificated Security and cause, or direct the Registrar to cause, in accordance with the standing instructions and procedures existing between the Depositary and the Registrar, the aggregate Principal Amount of Securities represented by the Global Security to be increased by the aggregate Principal Amount of the Certificated Security to be exchanged, and shall credit or cause to be credited to the account of the Person specified in such instructions a beneficial interest in the Global Security equal to the Principal Amount of the Certificated Security so cancelled. If no Global Securities are then outstanding, the Company shall issue and the Trustee upon receipt of a Company Order shall authenticate a new Global Security in the appropriate Principal Amount.

(iv) The restrictions imposed by the Legend upon the transferability of any Security shall cease and terminate when such Security has been sold pursuant to an effective registration statement under the Securities Act or transferred in compliance with Rule 144 under the Securities Act (or any successor provision thereto) or, if earlier, upon the expiration of the holding period applicable to sales thereof under Rule 144(k) under the Securities Act (or any successor provision). Any Security as to which such restrictions on transfer shall have expired in accordance with their terms or shall have terminated may, upon a surrender of such Security for exchange to the Registrar in accordance with the provisions of this Section 2.12 (accompanied, in the event that such restrictions on transfer have terminated by reason of a transfer in compliance with Rule 144 or any successor provision, by an Opinion of Counsel reasonably acceptable to the Company and the Registrar and addressed to the Company and the Registrar, to the effect that the transfer of such Security has been made in compliance with Rule 144 or such successor provision), be exchanged for a new Security, of like tenor and aggregate Principal Amount, which shall not bear the restrictive Legend. The Company shall inform the Trustee of the effective date of any registration statement registering the offer and sale of the Securities

under the Securities Act. The Trustee or the Registrar shall not be liable for any action taken or omitted to be taken by it in good faith in accordance with the aforementioned Opinion of Counsel.

As used in Sections 2.12(b) and (d), the term “transfer” encompasses any sale, pledge, transfer, hypothecation or other disposition of any Security

(v) The provisions of clauses (1), (2), (3) and (4) below shall apply only to Global Securities:

(1) Notwithstanding any other provisions of this Indenture or the Securities, except as provided in Section 2.12(c)(ii), a Global Security shall not be exchanged in whole or in part for a Security registered in the name of any Person other than the Depositary or one or more nominees thereof, provided that a Global Security may be exchanged for Securities registered in the names of any person designated by the Depositary in the event that (i) the Depositary has notified the Company that it is unwilling or unable to continue as Depositary for such Global Security or such Depositary has ceased to be a “clearing agency” registered under the Exchange Act, and a successor Depositary is not appointed by the Company within 90 days, (ii) the Company decides to discontinue use of the system of book-entry transfer through DTC (or any successor depositary); or (iii) an Event of Default has occurred and is continuing with respect to the Securities. Any Global Security exchanged pursuant to clause (i) or (ii) above shall be so exchanged in whole and not in part, and any Global Security exchanged pursuant to clause (iii) above may be exchanged in whole or from time to time in part as directed by the Depositary. Any Security issued in exchange for a Global Security or any portion thereof shall be a Global Security; provided that any such Security so issued that is registered in the name of a Person other than the Depositary or a nominee thereof shall not be a Global Security.

(2) Securities issued in exchange for a Global Security or any portion thereof shall be issued in definitive, fully registered form, without interest coupons, shall have an aggregate Principal Amount equal to that of such Global Security or portion thereof to be so exchanged, shall be registered in such names and be in such authorized denominations as the Depositary shall designate and shall bear the applicable legends provided for herein. Any Global Security to be exchanged in whole shall be surrendered by the Depositary to the Trustee, as Registrar. With regard to any Global Security to be exchanged in part, either such Global Security shall be so surrendered for exchange or, if the Trustee is acting as custodian for the Depositary or its nominee with respect to such Global Security, the Principal Amount thereof shall be reduced, by an amount equal to the portion thereof to be so exchanged, by means of an appropriate adjustment made on the records of the Trustee. Upon any such surrender or adjustment, the Trustee shall authenticate and deliver the Security issuable on such exchange to or upon the order of the Depositary or an authorized representative thereof.

(3) Subject to the provisions of clause (5) below, the registered Holder may grant proxies and otherwise authorize any Person, including Agent Members (as defined

below) and persons that may hold interests through Agent Members, to take any action which a holder is entitled to take under this Indenture or the Securities.

(4) In the event of the occurrence of any of the events specified in clause (1) above, the Company will promptly make available to the Trustee a reasonable supply of Certificated Securities in definitive, fully registered form, without interest coupons.

(5) Neither any members of, or participants in, the Depositary (collectively, the “Agent Members”) nor any other Persons on whose behalf Agent Members may act shall have any rights under this Indenture with respect to any Global Security registered in the name of the Depositary or any nominee thereof, or under any such Global Security, and the Depositary or such nominee, as the case may be, may be treated by the Company, the Trustee and any agent of the Company or the Trustee as the absolute owner and holder of such Global Security for all purposes whatsoever. Notwithstanding the foregoing, nothing herein shall prevent the Company, the Trustee or any agent of the Company or the Trustee from giving effect to any written certification, proxy or other authorization furnished by the Depositary or such nominee, as the case may be, or impair, as between the Depositary, its Agent Members and any other person on whose behalf an Agent Member may act, the operation of customary practices of such Persons governing the exercise of the rights of a holder of any Security.

(vi) Until the expiration of the holding period applicable to sales thereof under Rule 144(k) under the Securities Act (or any successor provision thereto), any stock certificate representing Common Stock issued upon conversion of any Security shall bear a legend in substantially the following form, unless such Common Stock has been sold pursuant to a registration statement that has been declared effective under the Securities Act (and which continues to be effective at the time of such transfer) or transferred in compliance with Rule 144 under the Securities Act (or any successor provision thereto), or such Common Stock has been issued upon conversion of Securities that have been transferred pursuant to a registration statement that has been declared effective under the Securities Act or pursuant to Rule 144 under the Securities Act (or any successor provision thereto), or unless otherwise agreed by the Company in writing with written notice thereof to the transfer agent:

THE COMMON STOCK EVIDENCED HEREBY HAS NOT BEEN REGISTERED UNDER THE UNITED STATES SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), OR ANY STATE SECURITIES LAWS, AND, ACCORDINGLY, MAY NOT BE REOFFERED, SOLD, ASSIGNED, TRANSFERRED, PLEDGED, ENCUMBERED OR OTHERWISE DISPOSED OF IN THE ABSENCE OF SUCH REGISTRATION OR UNLESS SUCH TRANSACTION IS EXEMPT FROM, OR NOT SUBJECT TO, REGISTRATION UNDER THE SECURITIES ACT.

BY ITS ACQUISITION HEREOF, THE HOLDER AGREES TO OFFER, SELL OR OTHERWISE TRANSFER THE COMMON STOCK EVIDENCED HEREBY PRIOR TO THE DATE THAT IS TWO YEARS AFTER THE LATER OF THE ORIGINAL ISSUE DATE HEREOF AND THE LAST DATE ON WHICH GILEAD SCIENCES, INC. (THE “COMPANY”) OR ANY AFFILIATE OF THE COMPANY WAS THE OWNER OF THE COMMON STOCK EVIDENCED HEREBY (OR ANY PREDECESSOR OF THE COMMON

STOCK EVIDENCED HEREBY) (THE “RESALE RESTRICTION TERMINATION DATE”) ONLY (A) TO THE COMPANY OR ANY SUBSIDIARY THEREOF, (B) PURSUANT TO A REGISTRATION STATEMENT WHICH HAS BEEN DECLARED EFFECTIVE UNDER THE SECURITIES ACT, OR (C) PURSUANT TO ANY OTHER AVAILABLE EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT, SUBJECT TO THE COMPANY’S AND THE TRANSFER AGENT’S RIGHT PRIOR TO ANY SUCH OFFER, SALE OR TRANSFER PURSUANT TO CLAUSE (C) PRIOR TO THE RESALE RESTRICTION TERMINATION DATE TO REQUIRE THE DELIVERY OF AN OPINION OF COUNSEL, CERTIFICATIONS AND/OR OTHER INFORMATION SATISFACTORY TO EACH OF THEM, AND IN EACH OF THE FOREGOING CASES, TO REQUIRE THAT A CERTIFICATE OF TRANSFER IN THE FORM APPEARING ON THE OTHER SIDE OF THIS CERTIFICATE IS COMPLETED AND DELIVERED BY THE TRANSFEROR TO THE TRANSFER AGENT. THIS LEGEND WILL BE REMOVED UPON THE REQUEST OF THE HOLDER AFTER THE RESALE RESTRICTION TERMINATION DATE.

Any such Common Stock as to which such restrictions on transfer shall have expired in accordance with their terms or as to which the conditions for removal of the foregoing legend set forth therein have been satisfied may, upon surrender of the certificates representing such shares of Common Stock for exchange in accordance with the procedures of the transfer agent for the Common Stock, be exchanged for a new certificate or certificates for a like number of shares of Common Stock, which shall not bear the restrictive legend required by this section.

(vii) Until the expiration of the holding period applicable to sales thereof under Rule 144(k) under the Securities Act (or any successor provision thereto), any certificate representing any Security shall bear a legend in substantially the following form, unless such Security has been sold pursuant to a registration statement that has been declared effective under the Securities Act (and which continues to be effective at the time of such transfer) or transferred in compliance with Rule 144 under the Securities Act (or any successor provision thereto), or unless otherwise agreed by the Company in writing with written notice thereof to the transfer agent:

THE NOTES AND THE SHARES OF COMMON STOCK ISSUABLE UPON CONVERSION OF THIS NOTE HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE SECURITIES ACT), OR ANY STATE SECURITIES LAWS. NEITHER THIS NOTE, THE SHARES OF COMMON STOCK ISSUABLE UPON CONVERSION OF THIS NOTE NOR ANY INTEREST OR PARTICIPATION HEREIN OR THEREIN MAY BE REOFFERED, SOLD, ASSIGNED, TRANSFERRED, PLEDGED, ENCUMBERED OR OTHERWISE DISPOSED OF IN THE ABSENCE OF SUCH REGISTRATION OR UNLESS SUCH TRANSACTION IS EXEMPT FROM, OR NOT SUBJECT TO, REGISTRATION.

STATEMENT WHICH HAS BEEN DECLARED EFFECTIVE UNDER THE SECURITIES ACT, (C) TO A PERSON IT REASONABLY BELIEVES IS A QUALIFIED INSTITUTIONAL BUYER AS DEFINED IN RULE 144A THAT PURCHASES FOR ITS OWN ACCOUNT OR FOR THE ACCOUNT OF A QUALIFIED INSTITUTIONAL BUYER TO WHOM NOTICE IS GIVEN THAT THE TRANSFER IS BEING MADE IN RELIANCE ON RULE 144A, (D) PURSUANT TO ANOTHER AVAILABLE EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT, SUBJECT TO THE COMPANY’S AND THE TRUSTEE’S RIGHT PRIOR TO ANY SUCH OFFER, SALE OR TRANSFER PURSUANT TO CLAUSE (D) TO REQUIRE THE DELIVERY OF AN OPINION OF COUNSEL, CERTIFICATIONS AND/OR OTHER INFORMATION SATISFACTORY TO EACH OF THEM, AND IN EACH OF THE FOREGOING CASES, TO REQUIRE THAT A CERTIFICATE OF TRANSFER IN THE FORM APPEARING ON THE OTHER SIDE OF THIS NOTE IS COMPLETED AND DELIVERED BY THE TRANSFEROR TO THE TRUSTEE. THIS LEGEND WILL BE REMOVED UPON THE REQUEST OF THE HOLDER AFTER THE RESALE RESTRICTION TERMINATION DATE.

Any such Security as to which such restrictions on transfer shall have expired in accordance with their terms or as to which the conditions for removal of the foregoing legend set forth therein have been satisfied may, upon surrender of the certificates representing such Security for exchange in accordance with the procedures of the transfer agent, be exchanged for a new certificate or certificates for a like amount of Securities, which shall not bear the restrictive legend required by this section.

The Company in issuing the Securities may use “CUSIP” numbers (if then generally in use), and, if so, the Trustee shall use “CUSIP” numbers in notices of redemption as a convenience to Holders; provided that any such notice may state that no representation is made as to the correctness of such numbers either as printed on the Securities or as contained in any notice of a redemption and that reliance may be placed only on the other identification numbers printed on the Securities, and any such redemption shall not be affected by any defect in or omission of such numbers. The Company will promptly notify the Trustee in writing of any change in the CUSIP numbers.

Section 3.01. Purchase of Securities at Option of the Holder Upon Change in Control.

(i) If prior to the Stated Maturity, there shall have occurred a Change in Control, each Holder shall have the right, at such Holder’s option, to require the Company to purchase for cash all or any portion of such Holder’s Securities in integral multiples of $1,000 Principal Amount at a purchase price specified in paragraph 5 of the Securities (the “Change in Control Purchase Price”), as of the date that is no later than 35 Business Days after the occurrence of the Change in Control but in no event prior to the date on which such Change in Control occurs (the

“Change in Control Purchase Date”), subject to satisfaction by or on behalf of the Holder of the requirements set forth in Section 3.01(c).

(ii) As promptly as practicable following the date the Company publicly announces the Change in Control transaction, but in no event less than 15 Business Days prior to the anticipated effective date of a Change in Control, the Company shall mail a written notice of Change in Control by first-class mail to the Trustee and to each Holder at their addresses shown in the register of the Registrar (and to beneficial owners as required by applicable law). The notice shall include a form of Change in Control Purchase Notice to be completed by the Holder and shall state:

(3) the date by which the Change in Control Purchase Notice pursuant to this Section 3.01 must be given;

(8) that Securities with respect to which a Change in Control Purchase Notice has been given by the Holder may be converted pursuant to Article 10 hereof only if the Change in Control Purchase Notice has been withdrawn in accordance with the terms of this Indenture;

(9) the procedures a Holder must follow to exercise rights under this Section 3.01;

(10) that Securities must be surrendered to the Paying Agent to collect payment of the Change in Control Purchase Price;

(11) that the Change in Control Purchase Price for any Security as to which a Change in Control Purchase Notice has been duly given and not withdrawn, together with any accrued interest payable with respect thereto, will be paid on or prior to the third Business Day following the later of the Change in Control Purchase Date and the time of surrender of such Security;

(14) that, unless the Company defaults in making payment of such Change in Control Purchase Price and interest due, if any, interest on Securities surrendered for purchase will cease to accrue on and after the Change in Control Purchase Date; and

(iii) A Holder may exercise its rights specified in Section 3.01(a) by delivery of a written notice of purchase (a “Change in Control Purchase Notice”) to the Paying Agent at any time prior to the Close of Business on the Change in Control Purchase Date, stating:

(1) if certificated Securities have been issued, the certificate number of the Securities (or, if the Holder’s Securities are not certificated, the Holder’s notice must comply with appropriate DTC procedures);

(2) the portion of the Principal Amount of the Security which the Holder will deliver to be purchased, which portion must be $1,000 or an integral multiple thereof; and

(3) that such Security shall be purchased pursuant to the terms and conditions specified in paragraph 5 of the Securities.

The delivery of such Security to the Paying Agent prior to, on or after the Change in Control Purchase Date (together with all necessary endorsements) at the offices of the Paying Agent shall be a condition to the receipt by the Holder of the Change in Control Purchase Price therefor; provided, however, that such Change in Control Purchase Price shall be so paid pursuant to this Section 3.01 only if the Security so delivered to the Paying Agent shall conform in all respects to the description thereof set forth in the related Change in Control Purchase Notice.

The Company shall purchase from the Holder thereof, pursuant to this Section 3.01, a portion of a Security if the Principal Amount of such portion is $1,000 or an integral multiple of $1,000. Provisions of this Indenture that apply to the purchase of all of a Security also apply to the purchase of such portion of such Security.

Any purchase by the Company contemplated pursuant to the provisions of this Section 3.01 shall be consummated by the delivery of the consideration to be received by the Holder (together with accrued and unpaid interest) on or prior to the third Business Day following the later of the Change in Control Purchase Date and the time of delivery of the Security to the Paying Agent in accordance with this Section 3.01.

Notwithstanding anything herein to the contrary, any Holder delivering to the Paying Agent the Change in Control Purchase Notice contemplated by this Section 3.01(c) shall have the right to withdraw such Change in Control Purchase Notice at any time prior to the Close of Business on the Change in Control Purchase Date by delivery of a written notice of withdrawal to the Paying Agent in accordance with Section 3.02.

The Paying Agent shall promptly notify the Company of the receipt by it of any Change in Control Purchase Notice or written withdrawal thereof.

The Company shall not be required to comply with this Section 3.01 if a third party mails a written notice of Change in Control in the manner, at the times and otherwise in compliance with this Section 3.01 and repurchases all Securities for which a Change in Control Purchase Notice shall be delivered and not withdrawn.

Upon receipt by the Paying Agent of the Change in Control Purchase Notice specified in Section 3.01(c), the Holder of the Security in respect of which such Change in Control Purchase Notice was given shall (unless such Change in Control Purchase Notice is withdrawn as specified in the following two paragraphs) thereafter be entitled to receive solely the Change in Control Purchase Price and any accrued and unpaid interest, with respect to such Security. Such Change in Control Purchase Price and interest shall be paid to such Holder, subject to receipt of funds by the Paying Agent, on or prior to the third Business Day following the later of (x) the Change in Control Purchase Date, with respect to such Security (provided the conditions in Section 3.01(c) have been satisfied) and (y) the time of delivery of such Security to the Paying Agent by the Holder thereof in the manner required by Section 3.01(c). Securities in respect of which a Change in Control Purchase Notice has been given by the Holder thereof may not be converted pursuant to Article 10 hereof on or after the date of the delivery of such Change in Control Purchase Notice unless such Change in Control Purchase Notice has first been validly withdrawn as specified in the following two paragraphs.

A Change in Control Purchase Notice may be withdrawn by means of a written notice of withdrawal delivered to the office of the Paying Agent in accordance with the Change in Control Purchase Notice at any time prior to the Close of Business on the Change in Control Purchase Date specifying:

(1) the certificate numbers of the Securities being withdrawn (or, if the Holder’s Securities are not certificated, the Holder’s notice must comply with appropriate DTC procedures),

(2) the Principal Amount of the Security with respect to which such notice of withdrawal is being submitted, and

(3) the Principal Amount, if any, of such Security which remains subject to the original Change in Control Purchase Notice and which has been or will be delivered for purchase by the Company.

A written notice of withdrawal of a Change in Control Purchase Notice may be in the form set forth in the preceding paragraph.

There shall be no purchase of any Securities pursuant to 3.01 if there has occurred (prior to, on or after, as the case may be, the giving, by the Holders of such Securities, of the required Change in Control Purchase Notice) and is continuing an Event of Default (other than a default in the payment of the Change in Control Purchase Price). The Paying Agent will promptly return to the respective Holders thereof any Securities (x) with respect to which a Change in Control Purchase Notice has been withdrawn in compliance with this Indenture, or (y) held by it

during the continuance of an Event of Default (other than a default in the payment of the Change in Control Purchase Price) in which case, upon such return, the Change in Control Purchase Notice with respect thereto shall be deemed to have been withdrawn.

Prior to 10:00 a.m. (New York City time) on or prior to the third Business Day following the Change in Control Purchase Date, as the case may be, the Company shall deposit with the Trustee or with the Paying Agent (or, if the Company or a Subsidiary or an Affiliate of either of them is acting as the Paying Agent, shall segregate and hold in trust as provided in Section 2.04) an amount of money (in immediately available funds if deposited on such Business Day) sufficient to pay the aggregate Change in Control Purchase Price of all the Securities or portions thereof which are to be purchased as of the Change in Control Purchase Date.

Any Security which is to be purchased only in part shall be surrendered at the office of the Paying Agent (with, if the Company or the Trustee so requires, due endorsement by, or a written instrument of transfer in form satisfactory to the Company and the Trustee duly executed by, the Holder thereof or such Holder’s attorney duly authorized in writing) and the Company shall execute and the Trustee shall authenticate and deliver to the Holder of such Security, without service charge, a new Security or Securities, of any authorized denomination as requested by such Holder in aggregate Principal Amount equal to, and in exchange for, the portion of the Principal Amount of the Security so surrendered which is not purchased.

Section 3.05. Covenant to Comply With Securities Laws Upon Purchase of Securities.

In connection with any offer to purchase or purchase of Securities under Section 3.01 hereof (provided that such offer or purchase constitutes an “issuer tender offer” for purposes of Rule 13e-4 (which term, as used herein, includes any successor provision thereto) under the Exchange Act at the time of such offer or purchase), the Company shall, to the extent required by law, (i) comply with Rule 13e-4, Rule 14e-1 and any other tender offer rules under the Exchange Act which may then apply and (ii) otherwise comply with all Federal and state securities laws so as to permit the rights and obligations under 3.01 to be exercised in the time and in the manner specified in Section 3.01.

The Trustee and the Paying Agent shall return to the Company any cash that remains unclaimed as provided in paragraph 10 of the Securities, together with interest thereon (subject to the provisions of Section 7.01(f)), held by them for the payment of the Change in Control Purchase Price; provided, however, that to the extent that the aggregate amount of cash deposited by the Company pursuant to Section 3.03 exceeds the aggregate Change in Control Purchase Price, with respect to, the Securities or portions thereof which the Company is obligated to purchase as of the Change in Control Purchase Date, whether as a result of withdrawal or otherwise, then promptly after the Business Day following the Change in Control Purchase Date,

the Trustee shall return any such excess to the Company together with interest thereon, if any (subject to the provisions of Section 7.01(f)).

The Company shall promptly make all payments of principal of, premium, if any, and interest in respect of the Securities on the dates and in the manner provided in the Securities or pursuant to this Indenture. Any amounts to be given to the Trustee or Paying Agent, shall be deposited with the Trustee or Paying Agent by 10:00 a.m., New York City time, by the Company. Principal Amount, Change in Control Purchase Price, and interest, shall be considered paid on the applicable date due if on such date (or, in the case of a Change in Control Purchase Price, on or prior to the third Business Day following the applicable Change in Control Purchase Date) the Trustee or the Paying Agent holds, in accordance with this Indenture, money or securities, if permitted hereunder, sufficient to pay all such amounts then due. All references in this indenture to “interest” shall include Additional Interest, if any. The Company shall pay all Additional Interest, if any, in the same manner on the dates set forth in the Securities and in the amounts set forth in the Registration Rights Agreement.

The Company shall, to the extent permitted by law, pay interest on overdue amounts at the rate per annum set forth in paragraph 1 of the Securities, compounded semiannually, which interest shall accrue from the date such overdue amount was originally due to the date payment of such amount, including interest thereon, has been made or duly provided for.

The Company shall deliver to the Trustee, within 15 days after it files such annual and quarterly reports, information, documents and other reports with the SEC, copies of its annual report and of the information, documents and other reports (or copies of such portions of any of the foregoing as the SEC may by rules and regulations prescribe) which the Company is required to file with the SEC pursuant to Section 13 or 15(d) of the Exchange Act. In the event the Company is at any time no longer subject to the reporting requirements of Section 13 or 15(d) of the Exchange Act, it shall continue to provide the Trustee with reports containing substantially the same information as would have been required to be filed with the SEC had the Company continued to have been subject to such reporting requirements. In such event, such reports shall be provided at the times the Company would have been required to provide reports had it continued to have been subject to such reporting requirements. The Company also shall comply with the other provisions of TIA Section 314(a). Delivery of such reports, information and documents to the Trustee is for informational purposes only and the Trustee’s receipt of the same shall not constitute constructive notice of any information contained therein or determinable from information contained therein, including the Company’s compliance with any of its covenants hereunder (as to which the Trustee is entitled to rely exclusively on Officers’ Certificates).

The Company shall deliver to the Trustee within 120 days after the end of each fiscal year of the Company (beginning with the fiscal year ending on December 31, 2006) an Officers’ Certificate, stating whether or not to the knowledge of the signers thereof the Company is in default in the performance and observance of any of the terms, provisions and conditions of this Indenture (without regard to any period of grace or requirement of notice provided hereunder) and if the Company shall be in default, specifying all such defaults and the nature and status thereof of which they may have knowledge.

The Company will maintain an office or agency of the Trustee, Registrar, Paying Agent and Conversion Agent where Securities may be presented or surrendered for payment, where Securities may be surrendered for registration of transfer, exchange for other Securities, purchase or conversion for Common Stock and where notices and demands to or upon the Company in respect of the Securities and this Indenture may be served. The Trustee’s office specified in Section 12.02 shall initially be such office or agency for all of the aforesaid purposes. The Company shall give prompt written notice to the Trustee of the location, and of any change in the location, of any such office or agency (other than a change in the location of the office of the Trustee). If at any time the Company shall fail to maintain any such required office or agency or shall fail to furnish the Trustee with the address thereof, such presentations, surrenders, notices and demands may be made or served at the address of the Trustee set forth in Section 12.02.

The Company may also from time to time designate one or more other offices or agencies where the Securities may be presented or surrendered for any or all such purposes and may from time to time rescind such designations.

The Company shall not consolidate with or merge with or into any other person or convey, transfer or lease all or substantially all its properties and assets to another person, unless:

(i) either (1) the Company shall be the continuing corporation or (2) the person (if other than the Company) formed by such consolidation or into which the Company is merged or the person which acquires by conveyance, transfer or lease all or substantially all the properties and assets of the Company (A) shall be organized and validly existing under the laws of the United States, any State thereof or the District of Columbia and (B) shall expressly assume, by an indenture supplemental hereto, executed and delivered to the Trustee, in form satisfactory to the Trustee, all of the obligations of the Company under the Securities and this Indenture;

(ii) immediately after giving effect to such transaction, no Default shall have occurred and be continuing; and

(iii) the Company shall have delivered to the Trustee an Officers’ Certificate and an Opinion of Counsel, each stating that such consolidation, merger, conveyance, transfer or lease and, if a supplemental indenture is required in connection with such transaction, such supplemental indenture, comply with this Article 5 and that all conditions precedent herein provided for relating to such transaction have been satisfied.

For purposes of the foregoing, the transfer (by lease, assignment, sale or otherwise) of the properties and assets of one or more Subsidiaries (other than to the Company or another Subsidiary), which, if such assets were owned by the Company, would constitute all or substantially all of the properties and assets of the Company, shall be deemed to be the transfer of all or substantially all of the properties and assets of the Company.

The successor person formed by such consolidation or into which the Company is merged or the successor person to which such conveyance, transfer or lease is made shall succeed to, and be substituted for, and may exercise every right and power of, the Company under this Indenture with the same effect as if such successor had been named as the Company herein; and thereafter, except in the case of a lease and obligations the Company may have under a supplemental indenture pursuant to Section 10.16, the Company shall be discharged from all obligations and covenants under this Indenture and the Securities. Subject to Section 9.06, the Company, the Trustee and the successor person shall enter into a supplemental indenture to evidence the succession and substitution of such successor person and such discharge and release of the Company.

(1) the Company defaults in the payment of the Principal Amount or Change in Control Purchase Price on any Security when the same becomes due and payable at its Stated Maturity, upon declaration, when due for purchase by the Company or otherwise;

(2) the Company defaults in payment of any interest due on the Securities, which default continues for 30 days;

(3) the Company fails to comply with any of its agreements in the Securities or this Indenture (other than those referred to in clauses (1) and (2) above) and such failure continues for 60 days after receipt by the Company of a Notice of Default (as defined below);

(4) (a) the Company fails to make any payment by the end of any applicable grace period after maturity of Indebtedness in an amount in excess of $100,000,000 and continuance of such failure, or (b) the acceleration of Indebtedness has occurred in an amount in excess of $100,000,000 because of a default with respect to such Indebtedness without such Indebtedness having been discharged or such acceleration having been

cured, waived, rescinded or annulled, in the case of (a) above, for a period of 30 days after receipt by the Company of a Notice of Default; provided, however, that if any such failure or acceleration referred to in (a) or (b) above shall cease or be cured, waived, rescinded or annulled, then the Event of Default by reason thereof shall be deemed not to have occurred; or

(5) the Company or any Significant Subsidiary, pursuant to or under or within the meaning of any Bankruptcy Law:

(B) consents to the entry of an order for relief against it in an involuntary case or proceeding or the commencement of any case against it;

(E) files a petition in bankruptcy or answer or consent seeking reorganization or relief; or

(F) consents to the filing of such petition or the appointment of or taking possession by a Custodian; or

(6) a court of competent jurisdiction enters an order or decree under any Bankruptcy Law that:

(A) is for relief against the Company or any Significant Subsidiary in an involuntary case or proceeding, or adjudicates the Company or any Significant Subsidiary insolvent or bankrupt; or

(B) appoints a Custodian of the Company or any Significant Subsidiary or for any substantial part of its property; or

A Default under clause (3) or clause (4) above is not an Event of Default until the Trustee notifies the Company, or the Holders of at least 25% in aggregate Principal Amount of the Securities at the time outstanding notify the Company and the Trustee, of the Default and the Company does not cure such Default (and such Default is not waived) within the time specified in clause (3) or clause (4) above after actual receipt of such notice. Any such notice must specify the Default, demand that it be remedied and state that such notice is a “Notice of Default”.

The Company shall deliver to the Trustee, within 30 days after it becomes aware of the occurrence thereof, written notice of any event which with the giving of notice or the lapse of

time, or both, would become an Event of Default under clause (3) or clause (4) above, its status and what action the Company is taking or proposes to take with respect thereto.

If an Event of Default (other than an Event of Default specified in Section 6.01(5) or (6) in respect of the Company) occurs and is continuing, the Trustee by Notice to the Company, or the Holders of at least 25% in aggregate Principal Amount of the Securities at the time outstanding by notice to the Company and the Trustee, may declare the Principal Amount through the date of declaration, and any accrued and unpaid interest through the date of such declaration, on all the Securities to be immediately due and payable. Upon such a declaration, such Principal Amount, and such accrued and unpaid interest if any, shall be due and payable immediately. If an Event of Default specified in Section 6.01(5) or (6) in respect of the Company occurs and is continuing, the Principal Amount plus accrued and unpaid interest if any, on all the Securities shall become and be immediately due and payable without any declaration or other act on the part of the Trustee or any Holders. The Holders of a majority in aggregate Principal Amount of the Securities at the time outstanding, by notice to the Trustee (and without notice to any other Holder) may rescind an acceleration and its consequences if the rescission would not conflict with any judgment or decree and if all existing Events of Default have been cured or waived except nonpayment of the Principal Amount that have become due solely as a result of acceleration and if all amounts due to the Trustee under Section 7.07 have been paid. No such rescission shall affect any subsequent Default or impair any right consequent thereto.

If an Event of Default occurs and is continuing, the Trustee may pursue any available remedy to collect the payment of the Principal Amount plus any accrued and unpaid interest if any, on the Securities or to enforce the performance of any provision of the Securities or this Indenture. The Trustee may maintain a proceeding even if the Trustee does not possess any of the Securities or does not produce any of the Securities in the proceeding. A delay or omission by the Trustee or any Holder in exercising any right or remedy accruing upon an Event of Default shall not impair the right or remedy or constitute a waiver of, or acquiescence in, the Event of Default. Except as set forth in Section 2.07 hereof, no remedy is exclusive of any other remedy. All available remedies are cumulative.

Subject to Section 6.02, the Holders of a majority in aggregate Principal Amount of the Securities at the time outstanding, by notice to the Trustee (and without notice to any other Holder), may waive an existing or past Default and its consequences except (1) an uncured Event of Default described in Section 6.01(1) or (2), or (2) a Default in respect of a provision that under Section 9.02 cannot be amended without the consent of each Holder affected. When a Default is waived, it is deemed cured, but no such waiver shall extend to any subsequent or other Default or impair any consequent right. This Section 6.04 shall be in lieu of Section 316(a)1(A) of the TIA and such Section 316(a)1(A) is hereby expressly excluded from this Indenture, as permitted by the TIA.

The Holders of a majority in aggregate Principal Amount of the Securities at the time outstanding may direct the time, method and place of conducting any proceeding for any remedy available to the Trustee or of exercising any trust or power conferred on the Trustee. However, the Trustee may refuse to follow any direction that conflicts with law or this Indenture or that the Trustee determines in good faith is unduly prejudicial to the rights of other Holders or could, in reasonable likelihood, impose personal liability upon the Trustee unless the Trustee is offered indemnity satisfactory to it. This Section 6.05 shall be in lieu of Section 316(a)1(B) of the TIA and such Section 316(a)1(B) is hereby expressly excluded from this Indenture, as permitted by the TIA.

A Holder may not pursue any remedy with respect to this Indenture or the Securities unless:

(1) the Holder gives to the Trustee written notice stating that an Event of Default is continuing;

(2) the Holders of at least 25% in aggregate Principal Amount of the Securities at the time outstanding make a written request to the Trustee to pursue the remedy;

(3) such Holder or Holders offer to the Trustee security or indemnity satisfactory to the Trustee against any loss, liability or expense;

(4) the Trustee does not comply with the request within 60 days after receipt of such notice, request and offer of security or indemnity; and

(5) the Holders of a majority in aggregate Principal Amount of the Securities at the time outstanding do not give the Trustee a direction inconsistent with the request during such 60-day period.

A Holder may not use this Indenture to prejudice the rights of any other Holder or to obtain a preference or priority over any other Holder.

Notwithstanding any other provision of this Indenture, the right of any Holder to receive payment of the Principal Amount, Change in Control Purchase Price, and interest in respect of the Securities held by such Holder, on or after the respective due dates expressed in the Securities, and to convert the Securities in accordance with Article 10, or to bring suit for the enforcement of any such payment on or after such respective dates or the right to convert, shall not be impaired or affected adversely without the consent of such Holder.

If an Event of Default described in Section 6.01(1) or (2) occurs and is continuing, the Trustee may recover judgment in its own name and as trustee of an express trust against the Company for the whole amount owing with respect to the Securities and the amounts provided for in Section 7.07.

In case of the pendency of any receivership, insolvency, liquidation, bankruptcy, reorganization, arrangement, adjustment, composition or other judicial proceeding relative to the Company or any other obligor upon the Securities or the property of the Company or of such other obligor or their creditors, the Trustee (irrespective of whether the Principal Amount, Change in Control Purchase Price, and interest in respect of the Securities shall then be due and payable as therein expressed or by declaration or otherwise and irrespective of whether the Trustee shall have made any demand on the Company for the payment of any such amount) shall be entitled and empowered, by intervention in such proceeding or otherwise,

(i) to file and prove a claim for the whole amount of the Principal Amount, Change in Control Purchase Price, or interest and to file such other papers or documents as may be necessary or advisable in order to have the claims of the Trustee (including any claim for the reasonable compensation, expenses, disbursements and advances of the Trustee, its agents and counsel or any other amounts due the Trustee under Section 7.07) and of the Holders allowed in such judicial proceeding, and

(ii) to collect and receive any moneys or other property payable or deliverable on any such claims and to distribute the same;

and any custodian, receiver, assignee, trustee, liquidator, sequestrator or similar official in any such judicial proceeding is hereby authorized by each Holder to make such payments to the Trustee and, in the event that the Trustee shall consent to the making of such payments directly to the Holders, to pay the Trustee any amount due it for the reasonable compensation, expenses, disbursements and advances of the Trustee, its agents and counsel, and any other amounts due the Trustee under Section 7.07.

Nothing herein contained shall be deemed to authorize the Trustee to authorize or consent to or accept or adopt on behalf of any Holder any plan of reorganization, arrangement, adjustment or composition affecting the Securities or the rights of any Holder thereof, or to authorize the Trustee to vote in respect of the claim of any Holder in any such proceeding.

If the Trustee collects any money pursuant to this Article 6, it shall pay out the money in the following order:

SECOND: to Holders for amounts due and unpaid on the Securities for the Principal Amount, Change in Control Purchase Price and interest, ratably, without preference or priority of any kind, according to such amounts due and payable on the Securities; and

The Trustee may fix a record date and payment date for any payment to Holders pursuant to this Section 6.10. At least 15 days before such record date, the Trustee shall mail to each Holder and the Company a notice that states the record date, the payment date and the amount to be paid.

In any suit for the enforcement of any right or remedy under this Indenture or in any suit against the Trustee for any action taken or omitted by it as Trustee, a court in its discretion may require the filing by any party litigant in the suit (other than the Trustee) of an undertaking to pay the costs of the suit, and the court in its discretion may assess reasonable costs, including reasonable attorneys’ fees and expenses, against any party litigant in the suit (other than the Trustee), having due regard to the merits and good faith of the claims or defenses made by the party litigant. This Section 6.11 does not apply to a suit by the Trustee, a suit by a Holder pursuant to Section 6.07 or a suit by Holders of more than 10% in aggregate Principal Amount of the Securities at the time outstanding. This Section 6.11 shall be in lieu of Section 315(e) of the TIA and such Section 315(e) is hereby expressly excluded from this Indenture, as permitted by the TIA.

The Company covenants (to the extent that it may lawfully do so) that it will not at any time insist upon, or plead, or in any manner whatsoever claim or take the benefit or advantage of, any stay or extension law or any usury or other law wherever enacted, now or at any time hereafter in force, which would prohibit or forgive the Company from paying all or any portion of the Principal Amount, Change in Control Purchase Price and interest in respect of Securities, or any interest on such amounts, as contemplated herein, or which may affect the covenants or the performance of this Indenture; and the Company (to the extent that it may lawfully do so) hereby expressly waives all benefit or advantage of any such law, and covenants that it will not hinder, delay or impede the execution of any power herein granted to the Trustee, but will suffer and permit the execution of every such power as though no such law had been enacted.

(i) If an Event of Default has occurred and is continuing, the Trustee shall exercise the rights and powers vested in it by this Indenture and use the same degree of care and skill in its

exercise as a prudent person would exercise or use under the circumstances in the conduct of such person’s own affairs.

(1) the Trustee need perform only those duties that are specifically set forth in this Indenture and no others; and

(2) in the absence of bad faith on its part, the Trustee may conclusively rely, as to the truth of the statements and the correctness of the opinions expressed therein, upon any certificate or opinion furnished to the Trustee and conforming to the requirements of this Indenture, but in case of any such certificates or opinions which by any provision hereof are specifically required to be furnished to the Trustee, the Trustee shall examine the certificates and opinions to determine whether or not they conform to the requirements of this Indenture, but need not confirm or investigate the accuracy of mathematical calculations or other facts stated therein.

This Section 7.01(b) shall be in lieu of Section 315(a) of the TIA and such Section 315(a) is hereby expressly excluded from this Indenture, as permitted by the TIA.

(iii) The Trustee may not be relieved from liability for its own negligent action, its own negligent failure to act or its own willful misconduct, except that:

(1) this paragraph (c) does not limit the effect of paragraph (b) of this Section 7.01;

(2) the Trustee shall not be liable for any error of judgment made in good faith by a Responsible Officer unless it is proved that the Trustee was negligent in ascertaining the pertinent facts; and

(3) the Trustee shall not be liable with respect to any action it takes or omits to take in good faith in accordance with a direction received by it pursuant to Section 6.05.

Subparagraphs (c)(1), (2) and (3) shall be in lieu of Sections 315(d)(1), 315(d)(2) and 315(d)(3) of the TIA and such Sections 315(d)(1), 315(d)(2) and 315(d)(3) are hereby expressly excluded from this Indenture, as permitted by the TIA.

(iv) Every provision of this Indenture that in any way relates to the Trustee is subject to paragraphs (a), (b), (c) and (e) of this Section 7.01.

(v) The Trustee may refuse to perform any duty or exercise any right or power or extend or risk its own funds or otherwise incur any financial liability unless it receives indemnity satisfactory to it against any loss, liability or expense.

(vi) Money held by the Trustee in trust hereunder need not be segregated from other funds except to the extent required by law. The Trustee (acting in any capacity hereunder) shall

be under no liability for interest on any money received by it hereunder unless otherwise agreed in writing with the Company.

Subject to its duties and responsibilities under the provisions of Section 7.01, and, except as expressly excluded from this Indenture pursuant to Section 7.01, subject also to its duties and responsibilities under the TIA:

(i) the Trustee may conclusively rely and shall be protected in acting or refraining from acting upon any resolution, certificate, statement, instrument, opinion, report, notice, request, direction, consent, order, bond, debenture, note, other evidence of indebtedness or other paper or document believed by it to be genuine and to have been signed or presented by the proper party or parties;

(ii) whenever in the administration of this Indenture the Trustee shall deem it desirable that a matter be proved or established prior to taking, suffering or omitting any action hereunder, the Trustee (unless other evidence be herein specifically prescribed) may, in the absence of bad faith on its part, request and conclusively rely upon an Officers’ Certificate;

(iii) the Trustee may execute any of the trusts or powers hereunder or perform any duties hereunder either directly or by or through agents or attorneys and the Trustee shall not be responsible for any misconduct or negligence on the part of any agent or attorney appointed with due care by it hereunder;

(iv) the Trustee shall not be liable for any action taken, suffered, or omitted to be taken by it in good faith which it believes to be authorized or within its rights or powers conferred under this Indenture;

(v) the Trustee may consult with counsel selected by it and any advice or Opinion of Counsel shall be full and complete authorization and protection in respect of any action taken or suffered or omitted by it hereunder in good faith and in accordance with such advice or Opinion of Counsel;

(vi) the Trustee shall be under no obligation to exercise any of the rights or powers vested in it by this Indenture at the request, order or direction of any of the Holders, pursuant to the provisions of this Indenture, unless such Holders shall have offered to the Trustee security or indemnity satisfactory to it against the costs, expenses and liabilities which may be incurred therein or thereby;

(vii) any request or direction of the Company mentioned herein shall be sufficiently evidenced by a Company Request or Company Order and any resolution of the Board of Directors may be sufficiently evidenced by a resolution of the Board of Directors;

(viii) the Trustee shall not be bound to make any investigation into the facts or matters stated in any resolution, certificate, statement, instrument, opinion, report, notice, request, direction, consent, order, bond, debenture, note, other evidence of indebtedness or other paper or

document, including, without limitation, any Company Request, Company Order or Officers’ Certificate, but the Trustee, in its discretion, may make such further inquiry or investigation into such facts or matters as it may see fit, and, if the Trustee shall determine to make such further inquiry or investigation, it shall be entitled to examine the books, records and premises of the Company, personally or by agent or attorney at the sole cost of the Company and shall incur no liability or additional liability of any kind by reason of such inquiry or investigation or lack thereof;

(ix) the Trustee shall not be deemed to have notice of any Default or Event of Default unless a Responsible Officer of the Trustee received written notice of an event which is in fact such a Default or Event of Default, and such notice references the Securities and this Indenture, describes the event with specificity, and alleges that the occurrence of this event is a Default or an Event of Default under this Indenture;

(x) the rights, privileges, protections, immunities and benefits given to the Trustee, including, without limitation, its right to be indemnified, are extended to, and shall be enforceable by, the Trustee in each of its capacities hereunder, and to each agent, custodian and other Person employed to act hereunder;

(xi) the Trustee may request that the Company deliver an Officers’ Certificate setting forth the names of individuals and/or titles of officers authorized at such time to take specified actions pursuant to this Indenture, which Officers’ Certificate may be signed by any person authorized to sign an Officers’ Certificate, including any person specified as so authorized in any such certificate previously delivered and not superseded; and

(xii) the permissive rights of the Trustee enumerated herein shall not be construed as duties.

The Trustee in its individual or any other capacity may become the owner or pledgee of Securities and may otherwise deal with the Company or its Affiliates with the same rights it would have if it were not Trustee. Any Paying Agent, Registrar, Conversion Agent or co-registrar may do the same with like rights. However, the Trustee must comply with Section 7.10.

The Trustee makes no representation as to the validity or adequacy of this Indenture or the Securities, it shall not be accountable for the Company’s use or application of the proceeds from the Securities, it shall not be responsible for any statement in the registration statement for the Securities under the Securities Act or in the Indenture or the Securities (other than its certificate of authentication), or the determination as to which beneficial owners are entitled to receive any notices hereunder.

If a Default occurs and if it is known to the Trustee, the Trustee shall give to each Holder notice of the Default within 90 days after the Trustee gains knowledge of the Default unless such Default shall have been cured or waived before the giving of such notice. Except in the case of a Default described in Section 6.01(1) or (2), the Trustee may withhold the notice if and so long as a committee of its Responsible Officers in good faith determines that withholding the notice is in the interests of Holders. The second sentence of this Section 7.05 shall be in lieu of the proviso to Section 315(b) of the TIA and such proviso is hereby expressly excluded from this Indenture, as permitted by the TIA. The Trustee shall not be deemed to have knowledge of a Default unless a Responsible Officer of the Trustee has received written notice of such Default in the manner described in Section 7.02(i).

Within 60 days after each May 15 beginning with May 15, 2007, the Trustee shall transmit to each Holder such reports as may be required under Section 313 of the TIA.

(i) to pay to the Trustee from time to time such reasonable compensation as the Company and the Trustee shall from time to time agree in writing for all services rendered by it hereunder (which compensation shall not be limited (to the extent permitted by law) by any provision of law in regard to the compensation of a trustee of an express trust);

(ii) to reimburse the Trustee upon its request for all reasonable expenses, disbursements and advances incurred or made by the Trustee in accordance with any provision of this Indenture (including the reasonable compensation and the expenses, advances and disbursements of its agents and counsel), except any such expense, disbursement or advance as may be attributable to its negligence or bad faith; and

(iii) to indemnify the Trustee or any predecessor Trustee and their agents for, and to hold them harmless against, any loss, damage, claim, liability, cost or expense (including reasonable attorney’s fees and expenses and taxes (other than taxes based upon, measured by or determined by the income of the Trustee)) reasonably incurred without negligence or bad faith on its part, arising out of or in connection with the acceptance or administration of this trust, including the reasonable costs and expenses of defending itself against any claim (whether asserted by the Company or any Holder or any other Person) or liability in connection with the acceptance, exercise or performance of any of its powers or duties hereunder.

To secure the Company’s payment obligations in this Section 7.07, Holders shall have been deemed to have granted to the Trustee a lien prior to the Securities on all money or property held or collected by the Trustee, except that held in trust to pay the Principal Amount, Change in Control Purchase Price, or interest, as the case may be, on particular Securities.

The Company’s payment obligations pursuant to this Section 7.07 shall survive the discharge of this Indenture and the resignation or removal of the Trustee. When the Trustee incurs expenses after the occurrence of a Default specified in Section 6.01(5) or (6), its expenses including the reasonable charges and expenses of its counsel, are intended to constitute expenses of administration under any Bankruptcy Law.

The Trustee may resign by so notifying the Company; provided, however, no such resignation shall be effective until a successor Trustee has accepted its appointment pursuant to this Section 7.08. The Holders of a majority in aggregate Principal Amount of the Securities at the time outstanding may remove the Trustee by so notifying the Trustee and the Company. The Company shall remove the Trustee if:

(3) a receiver or public officer takes charge of the Trustee or its property; or

If the Trustee resigns or is removed or if a vacancy exists in the office of Trustee for any reason, the Company shall promptly appoint, by resolution of the Board of Directors, a successor Trustee.

A successor Trustee shall deliver a written acceptance of its appointment to the retiring Trustee and to the Company satisfactory in form and substance to the retiring Trustee and the Company. Thereupon the resignation or removal of the retiring Trustee shall become effective, and the successor Trustee shall have all the rights, powers and duties of the Trustee under this Indenture. The successor Trustee shall mail a notice of its succession to Holders. The retiring Trustee shall promptly transfer all property held by it as Trustee to the successor Trustee, subject to the lien provided for in Section 7.07.

If a successor Trustee does not take office within 30 days after the retiring Trustee resigns or is removed, the retiring Trustee, the Company or the Holders of a majority in aggregate Principal Amount of the Securities at the time outstanding may petition any court of competent jurisdiction at the expense of the Company for the appointment of a successor Trustee.

If the Trustee fails to comply with Section 7.10, any Holder may petition any court of competent jurisdiction for the removal of the Trustee and the appointment of a successor Trustee.

The resignation or removal of a Trustee shall not diminish, impair or terminate its rights to indemnification pursuant to Section 7.07 as they relate to periods prior to such resignation or removal.

If the Trustee consolidates with, merges or converts into, or transfers all or substantially all its corporate trust business or assets to, another corporation, the resulting, surviving or transferee corporation without any further act shall be the successor Trustee.

There shall at all times be a Trustee hereunder which shall be eligible to act as Trustee and shall have a combined capital and surplus of at least $50,000,000. If such corporation publishes reports of condition at least annually, pursuant to law or to the requirements of federal, state, territorial or District of Columbia supervising or examining authority, then, for the purposes of this Section 7.10, the combined capital and surplus of such corporation shall be deemed to be its combined capital and surplus as set forth in its most recent report of condition so published. If at any time the Trustee shall cease to be eligible in accordance with the provisions of this Section 7.10, it shall resign immediately in the manner and with the effect hereinafter specified in this Article 7.

When (i) the Company delivers to the Trustee all outstanding Securities (other than Securities replaced pursuant to Section 2.07) for cancellation or (ii) all outstanding Securities have become due and payable and the Company deposits with the Trustee, the Paying Agent (if the Paying Agent is not the Company or any Subsidiary or any Affiliate of either of them) or the Conversion Agent cash or, if expressly permitted by the terms of the Securities and the Indenture, Common Stock (solely to satisfy the rights of Holders granted in Article 10) or governmental obligations sufficient to pay all amounts due and owing on all outstanding Securities (other than Securities replaced pursuant to Section 2.07), and if in either case the Company pays all other sums payable hereunder by the Company, then this Indenture shall, subject to Section 7.07, cease to be of further effect. The Trustee shall join in the execution of a document prepared by the Company acknowledging satisfaction and discharge of this Indenture on demand of the Company accompanied by an Officers’ Certificate stating that the consideration being given is expressly permitted by the terms of the Securities and that all conditions precedent to the discharge of the Indenture have been complied with by the Company and an Opinion of Counsel that such satisfaction and discharge does not violate the terms of this Indenture or the Securities, and at the cost and expense of the Company. The Trustee shall be allowed to conclusively rely on such Officers’ Certificate and Opinion of Counsel.

The Trustee and the Paying Agent shall return to the Company upon written request any money or securities held by them for the payment of any amount with respect to the Securities that remains unclaimed for two years, subject to applicable unclaimed property law. After return to the Company, Holders entitled to the money or securities must look to the Company for

payment as general creditors unless an applicable abandoned property law designates another person and the Trustee and the Paying Agent shall have no further liability to the Holders with respect to such money or securities for that period commencing after the return thereof.

The Company and the Trustee may amend this Indenture or the Securities without the consent of any Holder:

(3) to secure the Company’s obligations under the Securities and this Indenture;

(4) to add to the Company’s covenants for the benefit of the Holders or to surrender any right or power conferred upon the Company;

(5) to make any change to comply with the TIA, or any amendment thereto, or to comply with any requirement of the SEC in connection with the qualification of the Indenture under the TIA, or as necessary in connection with the registration of the Securities under the Securities Act if at any time the Company seeks to register the Securities thereunder; or

No amendment to cure any ambiguity, omission, defect or inconsistency in this Indenture made solely to conform the Indenture to the description of the Securities contained in the offering memorandum pursuant to which the Securities have been initially offered shall be deemed to adversely affect the interests of the Holders.

With the written consent of the Holders of at least a majority in aggregate Principal Amount of the Securities at the time outstanding, the Company and the Trustee may amend this Indenture or the Securities. However, without the consent of each Holder affected, an amendment to this Indenture or the Securities may not:

(1) reduce the Principal Amount, or Change in Control Purchase Price with respect to or any premium or interest (including Additional Interest) on any Security;

(2) make any Security payable in money or securities other than that stated in the Security;

(4) make any change that adversely affects the right of a Holder to convert any Security;

(5) make any change that adversely affects the right to require the Company to purchase the Securities in accordance with the terms thereof and this Indenture;

(6) impair the right to convert or receive payment with respect to, a Security, or right to institute suit for the enforcement of any payment with respect to, or conversion of, the Securities; or

(7) make any change in Section 6.04, Section 6.07 or this Section 9.02, except to increase any percentage set forth therein.

It shall not be necessary for the consent of the Holders under this Section 9.02 to approve the particular form of any proposed amendment, but it shall be sufficient if such consent approves the substance thereof.

After an amendment under this Section 9.02 becomes effective, the Company shall mail to each Holder a notice briefly describing the amendment. Failure to mail such notice or a defect in the notice shall not affect the validity of the amendment.

Every supplemental indenture executed pursuant to this Article shall comply with the TIA.

Until an amendment, waiver or other action by Holders becomes effective, a consent thereto by a Holder of a Security hereunder is a continuing consent by the Holder and every subsequent Holder of that Security or portion of the Security that evidences the same obligation as the consenting Holder’s Security, even if notation of the consent, waiver or action is not made on the Security. However, any such Holder or subsequent Holder may revoke the consent, waiver or action as to such Holder’s Security or portion of the Security if the Trustee receives the notice of revocation before the date the amendment, waiver or action becomes effective. After an amendment, waiver or action becomes effective, it shall bind every Holder.

Securities authenticated and delivered after the execution of any supplemental indenture pursuant to this Article 9 may, and shall if required by the Trustee, bear a notation in form approved by the Trustee as to any matter provided for in such supplemental indenture. If the Company shall so determine, new Securities so modified as to conform, in the opinion of the Board of Directors, to any such supplemental indenture may be prepared and executed by the Company and authenticated and delivered by the Trustee in exchange for outstanding Securities.

The Trustee shall sign any supplemental indenture authorized pursuant to this Article 9 if the amendment contained therein does not adversely affect the rights, duties, liabilities or immunities of the Trustee. If it does, the Trustee may, but need not, sign such supplemental indenture. In signing such supplemental indenture the Trustee shall receive, and (subject to the provisions of Section 7.01) shall be fully protected in relying upon, in addition to the documents required by Section 12.04, an Officers’ Certificate and an Opinion of Counsel stating that such amendment is authorized or permitted by this Indenture.

Upon the execution of any supplemental indenture under this Article, this Indenture shall be modified in accordance therewith, and such supplemental indenture shall form a part of this Indenture for all purposes; and every Holder of Securities theretofore or thereafter authenticated and delivered hereunder shall be bound thereby.

A Holder of a Security may convert such Security at any time during the period stated in paragraph 6 of the Securities upon the occurrence of any of the events set forth in paragraph 6 of the Securities, subject to the provisions of this Article 10. Subject to certain exceptions described in paragraph 6 of the Securities and Section 10.23, if a Holder surrenders its Securities for conversion, such holder will receive, in respect of each $1,000 of Principal Amount, the Conversion Value which shall be paid as follows:

(A) Cash in an amount equal to the lesser of (1) $1,000 and (2) the Conversion Value (the “Required Cash Amount”); and

(B) if the Conversion Value is greater than $1,000, a number of shares of Common Stock (the “Remaining Shares”), equal to the sum of the Daily Share Amounts for each of the ten consecutive Trading Days in the Conversion Reference Period, subject to the right of the Company to deliver cash in lieu of all or a portion of such Remaining Shares as described in this Section 10.01.

On any day prior to the first Trading Day of the applicable Conversion Reference Period, the Company may specify a percentage of the Daily Share Amount that will be settled in cash (the “Cash Percentage”) and will notify the Holders of such Cash Percentage through written notice to the Trustee (the “Cash Percentage Notice”). If the Company elects to specify a Cash Percentage, the amount of cash that the Company will deliver in respect of each Trading Day in the applicable Conversion Reference Period will equal the product of: (1) the Cash Percentage, (2) the Daily Share Amount for such Trading Day, and (3) the Volume Weighted Average Price of the Common Stock for such Trading Day (provided that after the consummation of a Change in Control in which the consideration is comprised entirely of cash, the amount used in this

clause (3) will be the cash price per share of Common Stock received by holders of Common Stock in such Change in Control). The number of shares deliverable in respect of each Trading Day in the applicable Conversion Reference Period will be a percentage of the Daily Share Amount equal to 100% minus the Cash Percentage. If the Company does not specify a Cash Percentage by the start of the applicable Conversion Reference Period, the Company shall settle 100% of the Daily Share Amount for each Trading Day in the applicable Conversion Reference Period with shares of Common Stock; provided, however, that the Company will pay cash in lieu of fractional shares otherwise issuable upon conversion of such Security, pursuant to Section 10.03 hereof. The Company may, at its option, revoke any Cash Percentage Notice through written notice to the Trustee prior to the start of the applicable Conversion Reference Period.

A Holder may convert a portion of the Principal Amount of a Security if the portion is $1,000 or an integral multiple of $1,000. Provisions of this Indenture that apply to conversion of all of a Security also apply to conversion of a portion of a Security.

In the event of a stock split, combination, dividend or any other event resulting in an adjustment to the Conversion Rate pursuant to Sections 10.06, 10.07, 10.08, 10.09 or 10.10, during the applicable Conversion Reference Period, appropriate adjustment to the equation for calculating Conversion Value shall be made, as determined by the Board of Directors.

To convert a Security, a Holder must satisfy the requirements in paragraph 6 of the Securities. The Conversion Agent shall, within one (1) Business Day of the Conversion Date, provide notice to the Company as set forth in Section 12.02(b).

As promptly as practicable following the end of the Conversion Reference Period applicable to the Securities being converted, the Company shall deliver to the Holder, through the Conversion Agent, the Required Cash Amount and Net Share Amount, if any (including cash in lieu of fractional shares pursuant to Section 10.03 hereof). The person in whose name the certificate representing any shares is registered shall be treated as a stockholder of record on and after the Conversion Date; provided, however, that no surrender of a Security on any date when the stock transfer books of the Company shall be closed shall be effective to constitute the person or persons entitled to receive the Net Share Amount upon such conversion as the record holder or holders of such shares of Common Stock on such date, but such surrender shall be effective to constitute the person or persons entitled to receive such shares of Common Stock as the record holder or holders thereof for all purposes at the Close of Business on the next succeeding day on which such stock transfer books are open; such conversion shall be at the Conversion Rate in effect on the date that such Security shall have been surrendered for conversion, as if the stock transfer books of the Company had not been closed. Upon conversion of a Security, such person shall no longer be a Holder of such Security.

No payment or adjustment will be made for dividends on, or other distributions with respect to, any Common Stock except as provided in this Article 10. On conversion of a Security, accrued interest with respect to the converted Security shall not be cancelled, extinguished or forfeited, but rather shall be deemed to be paid in full to the Holder thereof through delivery of the Required Cash Amount and the Net Share Amount, if any (together with

the cash payment, if any, in lieu of fractional shares) in exchange for the Security being converted pursuant to the provisions hereof.

If the Holder converts more than one Security at the same time, the Required Cash Amount and the Net Share Amount, if any (together with the cash payment, if any, in lieu of fractional shares) shall be based on the total Principal Amount of the Securities converted.

If the last day on which a Security may be converted is a Legal Holiday, the Security may be surrendered on the next succeeding day that is not a Legal Holiday.

Upon surrender of a Security that is converted in part, the Company shall execute, and the Trustee shall authenticate and deliver to the Holder, a new Security in an authorized denomination equal in Principal Amount to the unconverted portion of the Security surrendered.

The Company will not issue a fractional share of Common Stock upon conversion of a Security. Instead, the Company will deliver cash for the current market value of the fractional share. The current market value of a fractional share shall equal the arithmetic average of the Volume Weighted Average Price of the Common Stock for each of the ten consecutive Trading Days of the Conversion Reference Period, rounded to the nearest whole cent.

If a Holder converts a Security, the Company shall pay any documentary, stamp or similar issue or transfer tax due on the issue of any shares of Common Stock upon the conversion. However, the Holder shall pay any such tax which is due because the Holder requests the shares to be issued in a name other than the Holder’s name. The Conversion Agent may refuse to deliver the certificates representing the Common Stock being issued in a name other than the Holder’s name until the Conversion Agent receives a sum sufficient to pay any tax which will be due because the shares are to be delivered in a name other than the Holder’s name. Nothing herein shall preclude any tax withholding required by law or regulations.

The Company shall, prior to issuance of any Securities under this Article 10, and from time to time as may be necessary, reserve out of its authorized but unissued Common Stock a sufficient number of shares of Common Stock to permit the payment of the Remaining Shares, if applicable, upon conversion of the Securities.

All shares of Common Stock delivered upon payment of any Remaining Shares, if applicable, upon conversion of the Securities shall be newly issued shares or treasury shares, shall be duly and validly issued and fully paid and nonassessable and shall be free from preemptive rights and free of any lien or adverse claim.

The Company will comply with all federal and state securities laws regulating the offer and delivery of shares of Common Stock upon payment of any Remaining Shares, if applicable, upon conversion of Securities, if any, and will list or cause to have quoted such shares of

Common Stock on each national securities exchange or in the over-the-counter market or such other market on which the Common Stock is then listed or quoted.

(1) pays a dividend or makes a distribution on its Common Stock payable in shares of its Common Stock or shares of other Capital Stock;

(3) issues by reclassification of its Common Stock any shares of its Capital Stock (other than rights, warrants or options for its Capital Stock),

then the Conversion Rate in effect immediately prior to such action shall be adjusted so that the Holder of a Security thereafter converted may receive the number of shares of Capital Stock of the Company which such Holder would have owned immediately following such action if such Holder had converted the Security immediately prior to such action.

The adjustment shall become effective immediately after the record date in the case of a dividend or distribution and immediately after the effective date in the case of a subdivision, combination or reclassification.

If after an adjustment a Holder of a Security upon conversion of such Security may receive shares of two or more classes of Capital Stock of the Company, the Conversion Rate shall thereafter be subject to adjustment upon the occurrence of an action taken with respect to any such class of Capital Stock as is contemplated by this Article 10 with respect to the Common Stock, on terms comparable to those applicable to Common Stock in this Article 10.

If, after the Issue Date of the Securities, the Company distributes any rights, warrants or options to all holders of its Common Stock entitling them, for a period expiring within 60 days after the record date for such distribution, to purchase shares of Common Stock at a price per share less than the Average Closing Price, the Conversion Rate shall be adjusted in accordance with the formula:

O = the number of shares of Common Stock outstanding on the record date for the distribution to which this Section 10.07 is being applied.

N = the number of additional shares of Common Stock offered pursuant to the distribution.

M = the Average Closing Price, minus, in the case of (i) a distribution to which Section 10.06(3) applies or (ii) a distribution to which Section 10.08 applies, for which, in each case, (x) the record date shall occur on or before the record date for the distribution to which this Section 10.07 applies and (y) the Ex-Dividend Time shall occur on or after the date of the first public announcement for the distribution to which this Section 10.07 applies, the fair market value (on the record date for the distribution to which this Section 10.07 applies) of the

(1) Capital Stock of the Company distributed in respect of each share of Common Stock in such Section 10.06(3) distribution and

(2) assets of the Company or debt securities or any rights, warrants or options to purchase securities of the Company distributed in respect of each share of Common Stock in such Section 10.08 distribution.

The Board of Directors shall determine fair market values for the purposes of this Section 10.07.

In the event the Company makes a distribution pursuant to this Section 10.07 the Company will be required to give notice to the holders of Securities at least 20 days prior to the Ex-Dividend Date, as defined below, for such distribution.

The adjustment shall become effective immediately after the record date for the determination of shareholders entitled to receive the rights, warrants or options to which this Section 10.07 applies. If all of the shares of Common Stock subject to such rights, warrants or options have not been issued when such rights, warrants or options expire, then the Conversion Rate shall promptly be readjusted to the Conversion Rate that would then be in effect had the adjustment upon the issuance of such rights, warrants or options been made on the basis of the actual number of shares of Common Stock issued upon the exercise of such rights, warrants or options.

No adjustment shall be made under this Section 10.07 if the application of the formula stated above in this Section 10.07 would result in a value of R’ that is equal to or less than the value of R.

(i) If, after the Issue Date of the Securities, the Company distributes to all holders of its Common Stock any of its assets (including shares of any Subsidiary or business unit of the Company, but excluding distributions of Capital Stock or equity interests referred to in Section 10.08(b)), or debt securities or any rights, warrants or options to purchase securities of the Company (including securities or cash, but excluding (x) distributions of Capital Stock referred to in Section 10.06 and distributions of rights, warrants or options referred to in Section 10.07

and (y) cash dividends or other cash distributions referred to in Section 10.09), the Conversion Rate shall be adjusted, subject to the provisions of Section 10.08(c), in accordance with the formula:

M = the Average Closing Price, minus, in the case of a distribution to which Section 10.06(1) applies, for which (i) the record date shall occur on or before the record date for the distribution to which this Section 10.08(a) applies and (ii) the Ex-Dividend Time shall occur on or after the date of the Time of Determination for the distribution to which this Section 10.08(a) applies, the fair market value (on the record date for the distribution to which this Section 10.08(a) applies) of any Capital Stock of the Company distributed in respect of each share of Common Stock in such Section 10.06(1) distribution.

F = the fair market value (on the record date for the distribution to which this Section 10.08(a) applies) of the assets, securities, rights, warrants or options to be distributed in respect of each share of Common Stock in the distribution to which this Section 10.08(a) is being applied (including, in the case of cash dividends or other cash distributions giving rise to an adjustment, all such cash distributed concurrently).

The Board of Directors shall determine fair market values for the purposes of this Section 10.08(a).

The adjustment shall become effective immediately after the record date for the determination of shareholders entitled to receive the distribution to which this Section 10.08(a) applies.

(ii) If, after the Issue Date of the Securities, the Company pays a dividend or makes a distribution to all holders of its Common Stock consisting of Capital Stock of any class or series, or similar equity interests, of or relating to a Subsidiary or other business unit of the Company, then the Conversion Rate shall be adjusted in accordance with the formula:

M = the average of the Post-Distribution Prices of the Common Stock for the 10 Trading Days commencing on and including the fifth Trading Day after the date on which “ex-dividend trading” commences for such dividend or distribution on the principal United States exchange or market which such securities are then listed or quoted (the “Ex-Dividend Date”).

F = the fair market value of the securities distributed in respect of each share of Common Stock for which this Section 10.08(b) shall mean the number of securities distributed in respect of each share of Common Stock multiplied by the average of the Post-Distribution Prices of those securities distributed for the ten Trading Days commencing on and including the fifth Trading Day after the Ex-Dividend Date.

“Post-Distribution Price” of Capital Stock or any similar equity interest on any date means the closing per unit sale price (or, if no closing sale price is reported, the average of the bid and ask prices or, if more than one in either case, the average of the average bid and the average ask prices) on such date for trading of such units on a “when issued” basis without due bills (or similar concept) as reported in the composite transactions for the principal United States securities exchange on which such Capital Stock or equity interest is traded or, if the Capital Stock or equity interest, as the case may be, is not listed on a United States national or regional securities exchange, as reported by the National Association of Securities Dealers Automated Quotation System or by the National Quotation Bureau Incorporated; provided that if on any date such units have not traded on a “when issued” basis, the Post-Distribution Price shall be the closing per unit sale price (or, if no closing sale price is reported, the average of the bid and ask prices or, if more than one in either case, the average of the average bid and the average ask prices) on such date for trading of such units on a “regular way” basis without due bills (or similar concept) as reported in the composite transactions for the principal United States securities exchange on which such Capital Stock or equity interest is traded or, if the Capital Stock or equity interest, as the case may be, is not listed on a United States national or regional securities exchange, as reported by the National Association of Securities Dealers Automated Quotation System or by the National Quotation Bureau Incorporated. In the absence of such quotation, the Company shall be entitled to determine the Post-Distribution Price on the basis of such quotations which reflect the post-distribution value of the Capital Stock or equity interests as it considers appropriate.

(iii) In the event that, with respect to any distribution to which Section 10.08(a) would otherwise apply, the difference “M-F” as defined in the formula set forth in Section 10.08(a) is less than $1.00 or “F” is equal to or greater than “M”, then the adjustment provided by Section 10.08(a) shall not be made and in lieu thereof the provisions of Section 10.15 shall apply to such distribution.

(iv) In the event the Company makes a distribution pursuant to this Section 10.08 which has a per share value equal to more than 15% of the Closing Price of shares of Common Stock on the day preceding the declaration date for such distribution, the Company will be required to give notice to the holders of Securities at least 20 days prior to the Ex-Dividend Date, as defined below, for such distribution.

(i) If, after the Issue Date of the Securities, the Company distributes to all or substantially all holders of its Common Stock any cash (excluding any dividend or distribution in connection with the liquidation, dissolution or winding up of the Company, whether voluntary or involuntary), the Conversion Rate shall be adjusted, subject to the provisions of Section 10.13 in accordance with the formula:

R = the Conversion Rate in effect immediately prior to the Time of Determination;

C = the amount in cash per share the Company distributes to holders of the Common Stock (and for which no adjustment has been made).

If, after the Issue Date, the Company makes a payment of cash or other consideration by the Company or any of its subsidiaries to holders of Common Stock in respect of a tender offer or exchange offer, other than an odd-lot offer, for the Common Stock, and the value of the sum of (i) the aggregate cash and other consideration paid for such Common Stock, and (ii) the aggregate fair market value of any consideration paid for the purchase of Common Stock in respect of a tender offer or exchange offer, other than an odd-lot offer, within the twelve (12) months preceding the date of purchase of such shares of Common Stock in respect of which no adjustment pursuant to this Section 10.10 previously has been made, expressed as an amount per share of Common Stock validly tendered or exchanged pursuant to such tender offer or exchange offer, exceeds the Closing Price of the Common Stock on the Trading Day immediately following the last time (the “Expiration Time”) on which tenders or exchanges may be made pursuant to the tender or exchange offer, then the Conversion Rate shall be adjusted in accordance with the formula:

F = the fair market value (as determined by the Board of Directors) of the aggregate value of all cash and any other consideration paid or payable for shares of Common Stock validly tendered or exchanged and not withdrawn as of the Expiration Time (the “Purchased Shares”);

O = the number of shares of Common Stock outstanding immediately after the Expiration Time less any Purchased Shares;

O’ = the number of shares of Common Stock outstanding immediately after the Expiration Time, including any Purchased Shares; and

P = the Closing Price of the Common Stock on the Trading Day next succeeding the Expiration Time.

Such increase (if any) shall become effective immediately prior to the opening of business on the day following the Expiration Time. In the event that the Company is obligated to purchase shares pursuant to any such tender offer, but the Company is prevented by applicable law from effecting any such purchases or all such purchases are rescinded, the Conversion Rate shall again be adjusted to be the Conversion Rate that would then be in effect if such tender or exchange offer had not been made. If the application of this Section 10.10 to any tender or exchange offer would result in a decrease in the Conversion Rate, no adjustment shall be made for such tender or exchange offer under this Section 10.10.

Section 10.11. Adjustment to Conversion Rate Upon Change in Control Transactions.

If, after the Issue Date, a Change in Control occurs and a Holder elects to convert its Securities in connection with such Change in Control, the Company will increase the Applicable Conversion Rate for the Securities surrendered for conversion by a number of additional shares of Common Stock (the “Make-Whole Shares”), as described in this Section 10.11. A conversion of Securities will be deemed for the purposes of this Section 10.11 to be “in connection with” a Change in Control transaction if the notice of conversion of the Securities is received by the Conversion Agent from and including the effective date of the Change in Control, up to and including the Trading Day prior to the related Change in Control Purchase Date.

The number of Make-Whole Shares will be determined by reference to the table below and is based on the date which such Change in Control transaction becomes effective (the “Change in Control Effective Date”) and the price (the “Stock Price”) paid per share of Common Stock in such Change in Control transaction. If the holders of Common Stock receive only cash in the Change in Control transaction, the Stock Price shall be the cash amount paid per share of Common Stock. Otherwise, the Stock Price shall be the average of the closing sale prices of the Common Stock on the ten consecutive Trading Days up to but excluding the Change in Control Effective Date.

The Stock Prices set forth in the first column of the table below will be adjusted as of any date on which the Conversion Rate is adjusted. The adjusted Stock Prices will equal the Stock Prices applicable immediately prior to such adjustment, multiplied by a fraction, the numerator of which is the Applicable Conversion Rate immediately prior to the adjustment giving rise to the Stock Price adjustment and the denominator of which is the Applicable Conversion Rate as so adjusted. The number of Make-Whole Shares set forth in the table below will be adjusted at the same time and in the same manner as the Conversion Rate.

If the exact Stock Prices and effective dates are not set forth in the table, then: (i) if the Stock Price is between two Stock Price amounts in the table or the effective date is between two dates in the table, the Make-Whole Shares issued upon conversion of the Securities will be determined by a straight-line interpolation between the number of Make-Whole Shares set forth for the higher and lower Stock Price amounts and the two dates in the table, based on a 365-day year, (ii) if the Stock Price exceeds $250.00 per share, subject to adjustment as set forth herein, no Make-Whole Shares will be issued upon conversion of the Securities; and (iii) if the Stock Price is less than $65.13 per share, subject to adjustment as set forth herein, no Make-Whole Shares will be issued upon conversion of the Securities.

No adjustment in the Conversion Rate need be made unless the adjustment would require an increase or decrease of at least 1% of the Conversion Rate. Any adjustments that are less than 1% of the Conversion Rate shall be carried forward and taken into account in determining any subsequent adjustment. In addition, the Company shall make and pay any carry forward adjustments not otherwise effected upon conversion of any Security, upon required purchase of the Securities pursuant to Section 3.01, and five Business Days prior to the Stated Maturity.

No adjustment need be made for a transaction referred to in Section 10.06, 10.07, 10.08, 10.09, 10.10 or 10.16 if Holders are to participate in the transaction on a basis and with notice that the Board of Directors determines to be fair and appropriate in light of the basis and notice on which holders of Common Stock participate in the transaction. Such participation by Holders may include participation upon conversion; provided that an adjustment shall be made at such time as the Holders are no longer entitled to participate.

No adjustment need be made for rights to purchase Common Stock pursuant to a Company plan for reinvestment of dividends or interest.

No adjustment need be made for a change in the par value or no par value of the Common Stock.

To the extent the Securities become convertible pursuant to this Article 10 into cash, no adjustment need be made thereafter as to the cash. Interest will not accrue on the cash.

Notwithstanding the provisions of this Article 10, in no event shall the Conversion Rate exceed 15.3539 per $1,000 Principal Amount of the Securities on account of adjustments to the Conversion Rate described in Section 10.11, subject to the adjustments set forth in clauses 10.06, 10.07, 10.08, 10.09 and 10.10. Further, notwithstanding anything in Article 10, the Conversion Rate shall not exceed 66.6667 per $1,000 Principal Amount of the Securities other than as a result of proportional adjustments to the Conversion Rate described in Sections 10.06, 10.07 and 10.08.

Whenever the Conversion Rate is adjusted, the Company shall promptly mail to Holders a notice of the adjustment. The Company shall file with the Trustee and the Conversion Agent such notice and a certificate from the Company’s independent public accountants briefly stating the facts requiring the adjustment and the manner of computing it. The certificate shall be conclusive evidence that the adjustment is correct. Neither the Trustee nor any Conversion Agent shall be under any duty or responsibility with respect to any such certificate except to exhibit the same to any Holder desiring inspection thereof.

All calculations under this Article 10 shall be made to the nearest cent or to the nearest 1/1,000th of a share, as the case may be (with one-half cent and 5/10,000ths of a share being rounded upward).

(1) the Company takes any action that would require an adjustment in the Conversion Rate pursuant to Section 10.06, 10.07, 10.08, 10.09, 10.10 or 10.11 (unless no adjustment is to occur pursuant to Section 10.13); or

(2) the Company takes any action that would require a supplemental indenture pursuant to Section 10.16; or

then the Company shall mail to Holders and file with the Trustee and the Conversion Agent a notice stating the proposed record date for a dividend or distribution or the proposed effective date of a subdivision, combination, reclassification, consolidation, merger, binding share exchange, transfer, liquidation or dissolution. The Company shall file and mail the notice at least 15 days before such date. Failure to file or mail the notice or any defect in it shall not affect the validity of the transaction.

If the Company is a party to a transaction subject to Section 5.01 (other than a sale of all or substantially all of the assets of the Company in a transaction in which the holders of Common Stock immediately prior to such transaction do not receive securities, cash or other assets of the Company or any other person) or a merger or binding share exchange which

reclassifies or changes the outstanding Common Stock of the Company, the person obligated to deliver securities, cash or other assets upon conversion of Securities shall enter into a supplemental indenture. If the issuer of securities deliverable upon conversion of Securities is an Affiliate of the successor Company, that issuer shall join in the supplemental indenture.

The supplemental indenture shall provide that after the effective time of the transaction, settlement of the Conversion Value will be based on the kind and amount of cash, securities or other assets of the Company or another Person that a holder of Common Stock received in such transaction; provided that, for the avoidance of doubt, the Conversion Value will be paid in cash and at the Company’s election, cash, Common Stock or a combination of cash and Common Stock in accordance with the terms of this Article 10. If the holders of Common Stock of the Company have the opportunity to elect the form of consideration to be received in such transaction, then from and after the effective date of such transaction, the Securities shall be convertible into the consideration that the majority of the holders of Common Stock of the Company who made such an election received in such transaction. The supplemental indenture shall provide for adjustments which shall be as nearly equivalent as may be practical to the adjustments provided for in this Article 10. The successor Company shall mail to Holders a notice briefly describing the supplemental indenture.

If this Section applies, neither Section 10.06 nor 10.07 applies. If the Company makes a distribution to all holders of its Common Stock of any of its assets, or debt securities or any rights, warrants or options to purchase securities of the Company that, but for the provisions of Section 10.08(c), would otherwise result in an adjustment in the Conversion Rate pursuant to the provisions of Section 10.08, then, from and after the record date for determining the holders of Common Stock entitled to receive the distribution, a Holder of a Security that converts such Security in accordance with the provisions of this Indenture shall upon such conversion be entitled to receive, in addition to the shares of Common Stock into which the Security is convertible, the kind and amount of securities, cash or other assets comprising the distribution that such Holder would have received if such Holder had converted the Security immediately prior to the record date for determining the holders of Common Stock entitled to receive the distribution.

Any determination that the Company or the Board of Directors must make pursuant to Section 10.03, 10.06, 10.07, 10.08, 10.09, 10.10, 10.12, 10.13, 10.16 or 10.19 is conclusive.

The Trustee has no duty to determine when an adjustment under this Article 10 should be made, how it should be made or what it should be. The Trustee has no duty to determine whether a supplemental indenture under Section 10.17 need be entered into or whether any provisions of any supplemental indenture are correct. The Trustee shall not be accountable for and makes no representation as to the validity or value of any securities or assets issued upon conversion of Securities. The Trustee shall not be responsible for the Company’s failure to comply with this Article 10. Each Conversion Agent shall have the same protection under this Section 10.18 as the Trustee.

In the event that this Article 10 requires adjustments to the Conversion Rate under more than one of Sections 10.06(3), 10.07, 10.08 or 10.09, and the record dates for the distributions giving rise to such adjustments shall occur on the same date, then such adjustments shall be made by applying, first, the provisions of Section 10.06(3), second, the provisions of Section 10.08, third, the provisions of Section 10.09 and, fourth, the provisions of 10.07.

After an adjustment to the Conversion Rate under this Article 10, any subsequent event requiring an adjustment under this Article 10 shall cause an adjustment to the Conversion Rate as so adjusted.

Section 10.21. Rights Issued in Respect of Common Stock Issued Upon Conversion.

Each share of Common Stock issued upon conversion of Securities pursuant to this Article 10 shall be entitled to receive the appropriate number of rights (“Rights”), if any, and the certificates representing the Common Stock issued upon such conversion shall bear such legends, if any, in each case as may be provided by the terms of the Company’s Amended and Restated Rights Agreement, dated as of October 21, 1999, between the Company and Mellon Investor Services LLC (formerly known as ChaseMellon Shareholder Services, L.L.C.), as Rights Agent, as amended, or any successor shareholder rights agreement adopted by the Company, as the same may be amended from time to time (the “Rights Plan”), unless prior to any conversion, the Rights have separated from the Common Stock, in which case the Conversion Rate will be adjusted at the time of separation as if the Company distributed to all holders of Common Stock, shares of the Company’s Capital Stock, evidences of indebtedness or assets as described in Section 10.07 or 10.08, subject to readjustment in the event of the expiration, termination or redemption of such Rights. Notwithstanding anything to the contrary herein, the Conversion Rate shall not otherwise be adjusted as a result of any action under or with respect to the Rights Plan.

If the Company pays withholding taxes on behalf of a Holder as a result of an adjustment to the Conversion Rate, the Company may, at its option, set off such payments against payments of cash and Common Stock on the Securities.

(a) Notwithstanding anything in this Indenture to the contrary, when a Holder surrenders Securities for conversion, the Company may direct the Conversion Agent to surrender, on or prior to the commencement of the relevant Conversion Reference Period, such Securities to a financial institution designated by the Company (which may not be an Affiliate of the Company; provided that, for purposes of this Section 10.23, an “Affiliate” shall include any Person with direct or indirect ownership of 10% or more of the equity of the Company or the power, direct or indirect, to vote more than 10% of the securities having ordinary voting power

for the election of directors of the Company) (a “Financial Institution”) for exchange in lieu of conversion. The Company may, but is not required to, pay customary and reasonable fees in connection with the exchange.

(b) In order to accept any such Securities surrendered for conversion, the Financial Institution must agree to deliver, in exchange for such Securities, all cash or a combination of cash and shares of Common Stock equal to the Conversion Value, at the option of the Financial Institution.

(c) By the Close of Business on the Trading Day immediately preceding the start of the Conversion Reference Period, the Company must notify the Holder surrendering Securities for conversion that it has directed the Conversion Agent to surrender such Securities to a Financial Institution for exchange in lieu of conversion and such Financial Institution must notify the Conversion Agent whether it will deliver, upon exchange, shares of Common Stock, cash or a specified combination thereof.

(d) If the Financial Institution accepts any such Securities, it will deliver the appropriate number of shares of Common Stock, cash or a combination thereof, to the Conversion Agent and the Conversion Agent will deliver those shares of Common Stock or cash or combination thereof, as the case may be, to the Holder. Any Securities exchanged by such Financial Institution will remain outstanding.

(e) If such Financial Institution agrees to accept any Securities for exchange but does not timely deliver the related consideration, or if such Financial Institution does not accept the Securities for exchange, the Company will, as promptly as practical thereafter, but not later than the third Business Day following the determination of the Conversion Value, convert the Securities into cash and shares, if any, of Common Stock, pursuant to Section 10.02.

(f) The Company will not provide to the Financial Institution, directly or indirectly, any of such consideration delivered by the Financial Institution in exchange for such Securities.

In no event will the Company’s designation of a Financial Institution pursuant to this Section 10.23 require such Financial Institution to accept any Securities for exchange. The Company shall not be obligated to pay any consideration to, or otherwise enter into any agreement or arrangement with, a Financial Institution for or with respect to such designation pursuant to this Section 10.23.

Interest on any Security that is payable, and is punctually paid or duly provided for, on any applicable Interest Payment Date shall be paid to the person in whose name that Security is registered at the Close of Business on the Regular Record Date or accrual date, as the case may be, for such interest at the office or agency of the Company maintained for such purpose. Each installment of interest payable in cash on any Security shall be paid in same-day funds by

transfer to an account maintained by the payee located inside the United States, if the Trustee shall have received proper wire transfer instructions from such payee not later than the related Regular Record Date or accrual date, as the case may be, or, if no such instructions have been received by check mailed to the payee at its address set forth on the Registrar’s books. In the case of a permanent Global Security, interest payable on any applicable payment date will be paid to the Depositary, with respect to that portion of such permanent Global Security held for its account by Cede & Co. for the purpose of permitting such party to credit the interest received by it in respect of such permanent Global Security to the accounts of the beneficial owners thereof.

Except as otherwise specified with respect to the Securities, any interest on any Security that is payable, but is not punctually paid or duly provided for, within 30 days following any applicable payment date (herein called “Defaulted Interest”, which term shall include any accrued and unpaid interest that has accrued on such defaulted amount in accordance with paragraph 1 of the Securities), shall forthwith cease to be payable to the registered Holder thereof on the relevant Regular Record Date or accrual date, as the case may be, by virtue of having been such Holder, and such Defaulted Interest may be paid by the Company, at its election in each case, as provided in clause (1) or (2) below. All such Defaulted Interest shall be payable on the next Interest Payment Date.

(1) The Company may elect to make payment of any Defaulted Interest to the persons in whose names the Securities are registered at the Close of Business on a special record date for the payment of such Defaulted Interest, which shall be fixed in the following manner. The Company shall notify the Trustee in writing of the amount of Defaulted Interest proposed to be paid on each Security and the date of the proposed payment (which shall not be less than 20 days after such notice is received by the Trustee), and at the same time the Company shall deposit with the Trustee an amount of money equal to the aggregate amount proposed to be paid in respect of such Defaulted Interest or shall make arrangements satisfactory to the Trustee for such deposit on or prior to the date of the proposed payment, such money when deposited to be held in trust for the benefit of the persons entitled to such Defaulted Interest as in this clause provided. Thereupon the Trustee shall fix a special record date for the payment of such Defaulted Interest which shall be not more than 15 days and not less than 10 days prior to the date of the proposed payment and not less than 10 days after the receipt by the Trustee of the notice of the proposed payment. The Trustee shall promptly notify the Company of such special record date and, in the name and at the expense of the Company, shall cause notice of the proposed payment of such Defaulted Interest and the special record date therefor to be mailed, first-class postage prepaid, to each Holder at such Holder’s address as it appears on the list of Holders maintained pursuant to Section 2.05 not less than 10 days prior to such special record date. Notice of the proposed payment of such Defaulted Interest and the special record date therefor having been mailed as aforesaid, such Defaulted Interest shall be paid to the persons in whose names the Securities are registered at the Close of Business on such special record date and shall no longer be payable pursuant to the following clause (2).

(2) The Company may make payment of any Defaulted Interest on the Securities in any other lawful manner not inconsistent with the requirements of any securities exchange on which such Securities may be listed, and upon such notice as may be required by such exchange, if, after notice given by the Company to the Trustee of the proposed payment pursuant to this clause, such manner of payment shall be deemed practicable by the Trustee.

Subject to the foregoing provisions of this Article 11 and Section 2.06, each Security delivered under this Indenture upon registration of transfer of or in exchange for or in lieu of any other Security shall carry the rights to interest accrued and unpaid, and to accrue, which were carried by such other Security.

If any provision of this Indenture limits, qualifies, or conflicts with another provision which is required to be included in this Indenture by the TIA, the required provision shall control.

(i) Other than as set forth in Section 10.01, any request, demand, authorization, notice, waiver, consent or communication shall be in writing and delivered in person or mailed by first-class mail, postage prepaid, addressed as follows or transmitted by facsimile transmission (confirmed by guaranteed overnight courier) to the following facsimile numbers:

The Company or the Trustee by notice given to the other in the manner provided above may designate additional or different addresses for subsequent notices or communications.

Any notice or communication given to a Holder shall be mailed to the Holder, by first-class mail, postage prepaid, at the Holder’s address as it appears on the registration books of the Registrar and shall be sufficiently given if so mailed within the time prescribed.

Failure to mail a notice or communication to a Holder or any defect in it shall not affect its sufficiency with respect to other Holders. If a notice or communication is mailed in the manner provided above, it is duly given, whether or not received by the addressee.

If the Company mails a notice or communication to the Holders, it shall mail a copy to the Trustee and each Registrar, Paying Agent, Conversion Agent or co-registrar.

(ii) Any request, demand, authorization, notice, waiver, consent or communication to be provided in connection with Section 10.02 shall be in writing and delivered in person or transmitted by facsimile transmission (confirmed by guaranteed overnight courier) to the following facsimile numbers or via e-mail to the account or accounts specified by the Company by written notice to the Trustee:

Any notice party set forth in this Section 12.02(b) by notice given to the others in the manner provided above may designate additional or different addresses for subsequent notices or communications, including e-mail addresses.

Holders may communicate pursuant to TIA Section 312(b) with other Holders with respect to their rights under this Indenture or the Securities. The Company, the Trustee, the Registrar, the Paying Agent, the Conversion Agent and anyone else shall have the protection of TIA Section 312(c).

Upon any request or application by the Company to the Trustee to take any action under this Indenture, the Company shall furnish to the Trustee:

(1) an Officers’ Certificate stating that, in the opinion of the signers, all conditions precedent, if any, provided for in this Indenture relating to the proposed action have been complied with; and

(2) an Opinion of Counsel stating that, in the opinion of such counsel, all such conditions precedent have been complied with.

Unless the Trustee agrees, in its sole discretion, to accept a different form or format, each Officers’ Certificate or Opinion of Counsel with respect to compliance with a covenant or condition provided for in this Indenture shall include:

(1) a statement that each person making such Officers’ Certificate or Opinion of Counsel has read such covenant or condition;

(2) a brief statement as to the nature and scope of the examination or investigation upon which the statements or opinions contained in such Officers’ Certificate or Opinion of Counsel are based;

(3) a statement that, in the opinion of each such person, he has made such examination or investigation as is necessary to enable such person to express an informed opinion as to whether or not such covenant or condition has been complied with; and

(4) a statement that, in the opinion of such person, such covenant or condition has been complied with.

In case any provision in this Indenture or in the Securities shall be invalid, illegal or unenforceable, the validity, legality and enforceability of the remaining provisions shall not in any way be affected or impaired thereby.

Section 12.07. Rules by Trustee, Paying Agent, Conversion Agent and Registrar.

The Trustee may make reasonable rules for action by or a meeting of Holders. The Registrar, Conversion Agent and the Paying Agent may make reasonable rules for their functions.

The calculation of the Conversion Value, Conversion Date, Volume Weighted Average Price, Conversion Reference Period, Change in Control Purchase Price, Conversion Rate, Closing Price of the Common Stock, Required Cash Amount, Trading Price, the number of shares, if any, to be issued upon conversion and, except as otherwise provided in this Indenture, each other calculation to be made hereunder shall be the obligation of the Company. All calculations made by the Company as contemplated pursuant to this Section 12.08 shall be in good faith and final and binding on the Company and the Holders absent manifest error. The Company will provide a schedule of the calculations to the Trustee and the Trustee is entitled to rely upon the accuracy of the calculations without independent verification.

A “Legal Holiday” is any day other than a Business Day. If any specified date (including a date for giving notice) is a Legal Holiday, the action shall be taken on the next succeeding day that is not a Legal Holiday, and, if the action to be taken on such date is a payment in respect of the Securities, interest shall not accrue for the intervening period.

THE LAWS OF THE STATE OF NEW YORK SHALL GOVERN THIS INDENTURE AND THE SECURITIES.

A director, officer, employee or stockholder, as such, of the Company shall not have any liability for any obligations of the Company under the Securities or this Indenture or for any claim based on, in respect of or by reason of such obligations or their creation. By accepting a Security, each Holder shall waive and release all such liability. The waiver and release shall be part of the consideration for the issue of the Securities.

All agreements of the Company in this Indenture and the Securities shall bind its successor. All agreements of the Trustee in this Indenture shall bind its successor.

The parties may sign any number of copies of this Indenture. Each signed copy shall be an original, but all of them together represent the same agreement. One signed copy is enough to prove this Indenture.

IN WITNESS WHEREOF, the undersigned, being duly authorized, have executed this Indenture on behalf of the respective parties hereto as of the date first above written.


GILEAD SCIENCES, INC.

By:	/s/ JOHN F. MILLIGAN
	Name:	John F. Milligan, Ph.D.
	Title:	Executive Vice President and Chief Financial Officer


WELLS FARGO BANK, NATIONAL ASSOCIATION, as Trustee

By:	/s/ FRANK McDONALD
	Name:	Frank McDonald
	Title:	Vice President

UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY TO THE ISSUER OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY (AND ANY PAYMENT HEREON IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL SINCE THE REGISTERED OWNER HEREOF, ¹, HAS AN INTEREST HEREIN.

TRANSFERS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS IN WHOLE, BUT NOT IN PART, TO NOMINEES OF THE DEPOSITORY TRUST COMPANY, OR TO A SUCCESSOR THEREOF OR SUCH SUCCESSOR’S NOMINEE AND TRANSFERS OF PORTIONS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS MADE IN ACCORDANCE WITH THE RESTRICTIONS SET FORTH IN ARTICLE TWO OF THE INDENTURE REFERRED TO ON THE REVERSE HEREOF.²

BY ITS ACQUISITION HEREOF, THE HOLDER AGREES TO OFFER, SELL OR OTHERWISE TRANSFER SUCH NOTE PRIOR TO THE DATE WHICH IS TWO YEARS AFTER THE LATER OF THE LAST ORIGINAL ISSUE DATE HEREOF AND THE LAST DATE ON WHICH THE COMPANY OR ANY AFFILIATE OF THE COMPANY WAS THE OWNER OF THIS NOTE (OR ANY PREDECESSOR OF THIS NOTE) ONLY (A) TO THE COMPANY OR ANY SUBSIDIARY THEREOF, (B) PURSUANT TO A REGISTRATION STATEMENT WHICH HAS BEEN DECLARED EFFECTIVE UNDER THE SECURITIES ACT, (C) TO A PERSON IT REASONABLY BELIEVES IS A QUALIFIED INSTITUTIONAL BUYER AS DEFINED IN RULE 144A THAT PURCHASES FOR ITS

OWN ACCOUNT OR FOR THE ACCOUNT OF A QUALIFIED INSTITUTIONAL BUYER TO WHOM NOTICE IS GIVEN THAT THE TRANSFER IS BEING MADE IN RELIANCE ON RULE 144A, (D) PURSUANT TO ANOTHER AVAILABLE EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT, SUBJECT TO THE COMPANY’S AND THE TRUSTEE’S RIGHT PRIOR TO ANY SUCH OFFER, SALE OR TRANSFER PURSUANT TO CLAUSE (D) TO REQUIRE THE DELIVERY OF AN OPINION OF COUNSEL, CERTIFICATIONS AND/OR OTHER INFORMATION SATISFACTORY TO EACH OF THEM, AND IN EACH OF THE FOREGOING CASES, TO REQUIRE THAT A CERTIFICATE OF TRANSFER IN THE FORM APPEARING ON THE OTHER SIDE OF THIS NOTE IS COMPLETED AND DELIVERED BY THE TRANSFEROR TO THE TRUSTEE. THIS LEGEND WILL BE REMOVED UPON THE REQUEST OF THE HOLDER AFTER THE RESALE RESTRICTION TERMINATION DATE.⁴

GILEAD SCIENCES, INC., a Delaware Corporation, promises to pay to Cede & Co. or registered assigns, the Principal Amount of on May 1, 2011.

This Security shall bear cash interest at the rate of 0.50% per annum. This Security is convertible as specified on the other side of this Security.

Additional provisions of this Security are set forth on the other side of this Security.


GILEAD SCIENCES, INC.

By:
		Name:
		Title:

This Security shall bear cash interest at the rate of 0.50% per annum. Interest on this Security shall accrue from the Issue Date, or from the most recent date to which interest has been paid or provided for. Interest shall be payable semiannually in arrears on May 1 and November 1 of each year, beginning on November 1, 2006, to the holders of record of Securities at the Close of Business on the April 15 or October 15 immediately preceding such Interest Payment Date. Each payment of cash interest on this Security shall include interest accrued for the period commencing on and including the immediately preceding Interest Payment Date (or, if none, the scheduled original Issue Date) through the day before the applicable Interest Payment Date or purchase date. Any payment required to be made on any day that is not a Business Day shall be made on the next succeeding Business Day. Interest shall be calculated using a 360-day year composed of twelve 30-day months. Interest shall cease to accrue on this Security upon its Stated Maturity, conversion or purchase by the Company at the option of the Holder upon a Change in Control in accordance with paragraph 5 hereof.

If the Principal Amount hereof or any portion of such Principal Amount is not paid when due (whether upon acceleration pursuant to Section 6.02 of the Indenture, upon the date set for payment of the Change in Control Purchase Price pursuant to paragraph 5 hereof or upon the Stated Maturity of this Security) or if interest (including Additional Interest, if any) due hereon or any portion of such interest is not paid when due in accordance with paragraph 5 or 7 hereof, then in each such case the overdue amount shall, to the extent permitted by law, bear interest at the rate of 0.50% per annum, compounded semiannually, which interest shall accrue from the date such overdue amount was originally due to the date payment of such amount, including interest thereon, has been made or duly provided for. All such interest shall be payable on the next Interest Payment Date.

Subject to the terms and conditions of the Indenture, the Company will make payments in respect of Change in Control Purchase Prices and at Stated Maturity to Holders who surrender Securities to a Paying Agent to collect such payments in respect of the Securities. The Company will pay any cash amounts in money of the United States that at the time of payment is legal tender for payment of public and private debts. However, the Company may make such cash payments by check payable in such money.

Initially, Wells Fargo Bank, National Association, a national banking association (the “Trustee”), will act as Paying Agent, Conversion Agent and Registrar. The Company may appoint and change any Paying Agent, Conversion Agent, Registrar or co-registrar without notice, other than notice to the Trustee. The Company or any of its Subsidiaries or any of their

Affiliates may act as Paying Agent, Conversion Agent, Registrar or co-registrar. The Company may maintain deposit accounts and conduct other banking transactions with the Trustee in the normal course of business.

The Company issued the Securities under an Indenture dated as of April 25, 2006 (the “Indenture”), between the Company and the Trustee. The terms of the Securities include those stated in the Indenture and those made part of the Indenture by reference to the Trust Indenture Act of 1939, as in effect from time to time (the “TIA”). Capitalized terms used herein and not defined herein have the meanings ascribed thereto in the Indenture. The Securities are subject to all such terms, and Holders are referred to the Indenture for a statement of those terms.

The Securities are senior unsecured obligations of the Company limited to $650,000,000 aggregate Principal Amount (subject to Section 2.07 of the Indenture). The Indenture does not limit other indebtedness of the Company, secured or unsecured.

At the option of the Holder and subject to the terms and conditions of the Indenture, the Company shall become obligated to purchase the Securities held by such Holder no later than 35 Business Days after the occurrence of a Change in Control of the Company for a Change in Control Purchase Price equal to the Principal Amount of the Securities to be purchased, plus accrued and unpaid interest to, but excluding, the Change in Control Purchase Date, unless the Change in Control Purchase Date is after a Regular Record Date and on or prior to the Interest Payment Date to which it relates, in which case interest accrued to the Interest Payment Date will be paid to Holders of the Securities as of the preceding Regular Record Date, which Change in Control Purchase Price shall be paid in cash.

In addition to the Change in Control Purchase Price payable with respect to all Securities or portions thereof to be purchased as of the Change in Control Purchase Date, the Holders of such Securities (or portions thereof) shall be entitled to receive accrued and unpaid interest with respect thereto, which shall be paid at the same time as the Change in Control Purchase Price.

Holders have the right to withdraw any Change in Control Purchase Notice by delivering to the Paying Agent a written notice of withdrawal in accordance with the provisions of the Indenture.

If cash (and/or securities if permitted under the Indenture) sufficient to pay the Change in Control Purchase Price, of, together with any accrued and unpaid interest with respect to, all Securities or portions thereof to be purchased as of the Change in Control Purchase Date is deposited with the Paying Agent on or prior to the third Business Day following the Change in Control Purchase Date, interest shall cease to accrue on such Securities (or portions thereof) immediately after such Change in Control Purchase Date whether or not the Security is delivered to the Paying Agent, and the Holder thereof shall have no other rights as such (other than the

right to receive the Change in Control Purchase Price and accrued and unpaid interest upon surrender of such Security).

A Holder of a Security may convert such Security into cash and, at the option of the Company, shares of Common Stock of the Company before the Close of Business on May 1, 2011, if at least one of the following conditions is satisfied:

(a) during any calendar quarter commencing at any time after September 30, 2006, and only during such calendar quarter, if the Closing Price of the Common Stock for at least 20 Trading Days in the period of 30 consecutive Trading Days ending on the last Trading Day of the preceding calendar quarter exceeds 130% of the Conversion Price per share on that 30th Trading Day on the last day of such preceding calendar quarter. The Conversion Agent will determine on the Company’s behalf at the beginning of each calendar quarter commencing at any time after September 30, 2006 through and including the calendar quarter ending March 31, 2011, whether the Securities are convertible as a result of the price of the Common Stock and notify the Company and the Trustee. Upon determining that the Holders are entitled to convert their Securities in accordance with the provisions described in the Indenture on account of this subsection (a), the Company will promptly (1) issue a press release and use its reasonable efforts to post such information on its website or otherwise publicly disclose this information or (2) provide notice to the Holders in a manner contemplated by the Indenture, including through the facilities of DTC;

(b) the Company elects to distribute to all holders of Common Stock (i) rights or warrants entitling them to subscribe for or purchase, for a period expiring within 60 days after the record date for such distribution, Common Stock at less than the Average Closing Prices of the Common Stock, or (ii) cash, debt securities (or other evidence of Indebtedness) or other assets (excluding dividends or distributions described in Sections 10.06(1), 10.06(2) and 10.06(3) of the Indenture), which distribution, together with all other distributions within the preceding 12 months, has a per share value exceeding 15% of the Average Closing Price of the Common Stock; or

(c) if a Change in Control occurs or if the Company is a party to a consolidation, merger, binding share exchange, transfer or lease of all or substantially all of the Company’s assets, pursuant to which the Common Stock would be converted into cash, securities or other assets, at any time from or after the date which is 15 days prior to the effective time of the transaction until 35 days after the actual date of such transaction (or, if the transaction also constitutes a Change in Control, until the Change in Control Purchase Date). After the effective time of the transaction, settlement of the Conversion Value will be based on the kind and amount of cash, securities or other assets of the Company or another Person that a holder of Common Stock received in such transaction; provided that, for the avoidance of doubt, the Conversion Value will be paid in cash and at the Company’s election, cash, Common Stock or a combination of cash and Common Stock in accordance with the terms of the Indenture. In the event holders of Common Stock have the opportunity to elect the form of consideration to be received in such transaction, then from and after the effective date of such transaction, the Securities shall be

convertible into the consideration that a majority of the holders of Common Stock who made such an election received in such transaction. The Company will notify Holders and the Trustee as promptly as practicable following the date the Company publicly announces such transaction (but in no event less than 15 days prior to the anticipated effective date of such transaction).

If the Company makes a distribution described in subsection (b), the Company must notify Holders at least 20 days prior to the Ex-Dividend Date for such distribution. Once the Company has given such notice, Holders may surrender their Securities for conversion at any time until the earlier of the Close of Business on the Business Day prior to the Ex-Dividend Date or the Company’s announcement that such distribution will not take place, even if the Securities are not convertible at that time. No adjustment to the ability of Holders to convert will be made if Holders are entitled to participate in the distribution without conversion.

In the case of a Change in Control, (i) the Conversion Rate will be adjusted as described in Section 10.11 of the Indenture and (ii) the Holder can require the Company to purchase all or a portion of its Securities described in paragraph 5.

A Security in respect of which a Holder has delivered a Change in Control Purchase Notice exercising the option of such Holder to require the Company to purchase such Security may be converted only if such notice of exercise is withdrawn in accordance with the terms of the Indenture.

The Initial Conversion Rate is 12.9024 shares of Common Stock per $1,000 Principal Amount, subject to adjustment in certain events described in the Indenture. The Company will deliver cash or a check in lieu of any fractional share of Common Stock.

Notwithstanding anything herein to the contrary, Holders may surrender the Securities for conversion at any time on or after April 1, 2011, until the Close of Business on the Business Day immediately preceding the Maturity Date.

Accrued and unpaid interest will not be paid in cash on Securities that are converted but will be paid in the manner provided in the following paragraph; provided, however, that Securities surrendered for conversion during the period, in the case of interest, from the Close of Business on any Regular Record Date next preceding any Interest Payment Date to the opening of business on such Interest Payment Date, shall be entitled to receive such semiannual interest payable on such Securities on the corresponding Interest Payment Date and Securities surrendered for conversion during such periods must be accompanied by payment of an amount equal to the interest with respect thereto that the registered Holder is to receive; provided that no such payment need be made (i) in connection with any conversion following the Regular Record Date immediately preceding the final Interest Payment Date; (ii) if the Company has specified a Change in Control Purchase Date that is after a Record Date and on or prior to the corresponding Interest Payment Date; or (iii) to the extent of Defaulted Interest, if any Defaulted Interest exists at the time of conversion with respect to such Security.

A Holder may convert a portion of a Security if the Principal Amount of such portion is $1,000 or an integral multiple of $1,000. No payment or adjustment will be made for dividends

on the Common Stock except as provided in the Indenture. On conversion of a Security, a Holder will not receive, except as described herein, any cash payment representing accrued interest. Instead, accrued interest will be deemed paid by the cash and/or shares of Common Stock received by the Holder on conversion. Delivery to the holder of such cash and/or shares will be deemed to satisfy the Company’s obligation to pay (i) the Principal Amount of the Security and (ii) accrued and unpaid interest, and accrued interest with respect to the converted Security shall not be cancelled, extinguished or forfeited, but rather shall be deemed to be paid in full.

The Company will not adjust the Conversion Rate to account for accrued interest.

To convert a Security that is represented by a Global Security, a Holder must convert by book-entry transfer to the Conversion Agent through the facilities of the DTC. To convert a Security that is represented by a Certificated Security, a Holder must (1) complete and manually sign the conversion notice below and deliver such notice to the Conversion Agent, (2) surrender the Security to the Conversion Agent, (3) furnish appropriate endorsements and transfer documents if required by the Conversion Agent, the Company or the Trustee and (4) pay all transfer or similar tax, if required.

The Conversion Rate will be adjusted for dividends or distributions on Common Stock payable in Common Stock or other Capital Stock; subdivisions, combinations or certain reclassifications of Common Stock; distributions to all holders of Common Stock of certain rights to purchase Common Stock for a period expiring within 60 days of the record date for such distribution at less than the Closing Price of the Common Stock at the Time of Determination; distributions to such holders of assets (including shares of Capital Stock of a Subsidiary) or debt securities of the Company or certain rights to purchase securities of the Company; cash dividends or cash distributions; and distributions in respect of a tender offer or exchange offer of the Common Stock. However, no adjustment need be made if Holders may participate in the transaction or in certain other cases.

Except as otherwise specified with respect to the Securities, any Defaulted Interest on any Security shall forthwith cease to be payable to the registered Holder thereof on the relevant Regular Record Date or accrual date, as the case may be, by virtue of having been such Holder, and such Defaulted Interest may be paid by the Company as provided for in Section 11.02 of the Indenture.

The Securities are in fully registered form, without coupons, in denominations of $1,000 of Principal Amount and integral multiples of $1,000. A Holder may transfer or exchange Securities in accordance with the Indenture. The Registrar may require a Holder, among other things, to furnish appropriate endorsements and transfer documents and to pay any taxes and fees required by law or permitted by the Indenture. The Registrar need not register the transfer or exchange of any Securities in respect of which a Change in Control Purchase Notice has been

given and not withdrawn (except, in the case of a Security to be purchased in part, the portion of the Security not to be purchased).

The registered Holder of this Security may be treated as the owner of this Security for all purposes.

The Trustee and the Paying Agent shall return to the Company upon written request any money or securities held by them for the payment of any amount with respect to the Securities that remains unclaimed for two years, subject to applicable unclaimed property laws. After return to the Company, Holders entitled to the money or securities must look to the Company for payment as general creditors unless an applicable abandoned property law designates another person.

Subject to certain exceptions set forth in the Indenture, (i) the Indenture or the Securities may be amended with the written consent of the Holders of at least a majority in aggregate Principal Amount of the Securities at the time outstanding and (ii) certain Defaults may be waived with the written consent of the Holders of a majority in aggregate Principal Amount of the Securities at the time outstanding. Subject to certain exceptions set forth in the Indenture, without the consent of any Holder, the Company and the Trustee may amend the Indenture or the Securities to cure any ambiguity, omission, defect or inconsistency, or to comply with Article 5 or Section 10.16 of the Indenture, to secure the Company’s obligations under this Security or to add to the Company’s covenants for the benefit of the Holders or to surrender any right or power conferred, or to comply with any requirement of the SEC in connection with the qualification of the Indenture under the TIA, or as necessary in connection with the registration of the Securities under the Securities Act or to make any change that does not adversely affect the rights of any Holders.

Under the Indenture, Events of Default include: (1) the Company defaults in the payment of the Principal Amount or Change in Control Purchase Price, when the same becomes due and payable; (2) the Company defaults in payment of any interest due on the Securities, which default continues for 30 days; (3) the Company fails to comply with any of its agreements in the Securities or the Indenture (other than those referred to in clauses (1) and (2) above) and such failure continues for 60 days after receipt by the Company of a Notice of Default; (4) the (a) failure of the Company to make any payment by the end of any applicable grace period after maturity of Indebtedness in an amount in excess of $100.0 million, or (b) acceleration of Indebtedness in an amount in excess of $100.0 million because of a default with respect to such Indebtedness without such Indebtedness having been discharged or such acceleration having been cured, waived, rescinded or annulled, subject to notice and lapse of time; provided,

however, that if any such failure or acceleration referred to in (a) or (b) above shall cease or be cured, waived, rescinded or annulled, then the Event of Default by reason thereof shall be deemed not to have occurred; and (5) certain events of bankruptcy or insolvency. If an Event of Default occurs and is continuing, the Trustee, or the Holders of at least 25% in aggregate Principal Amount of the Securities at the time outstanding, may declare the Principal Amount through the date of such declaration, and any accrued and unpaid interest through the date of such declaration, on all the Securities to be due and payable immediately. Certain events of bankruptcy or insolvency are Events of Default which will result in the Principal Amount on the Securities, and any accrued and unpaid interest through the occurrence of such event, becoming due and payable immediately upon the occurrence of such Events of Default.

Holders may not enforce the Indenture or the Securities except as provided in the Indenture. The Trustee may refuse to enforce the Indenture or the Securities unless it receives indemnity or security reasonably satisfactory to it. Subject to certain limitations, Holders of a majority in aggregate Principal Amount of the Securities at the time outstanding may direct the Trustee in its exercise of any trust or power. The Trustee may withhold from Holders notice of any continuing Default (except a Default in payment of amounts specified in clause (1) or (2) above) if it determines that withholding notice is in their interests.

Subject to certain limitations imposed by the TIA, the Trustee under the Indenture, in its individual or any other capacity, may become the owner or pledgee of Securities and may otherwise deal with and collect obligations owed to it by the Company or its Affiliates and may otherwise deal with the Company or its Affiliates with the same rights it would have if it were not Trustee.

A director, officer, employee or stockholder, as such, of the Company shall not have any liability for any obligations of the Company under the Securities or the Indenture or for any claim based on, in respect of or by reason of such obligations or their creation. By accepting a Security, each Holder waives and releases all such liability. The waiver and release are part of the consideration for the issue of the Securities.

This Security shall not be valid until an authorized officer of the Trustee manually signs the Trustee’s Certificate of Authentication on the other side of this Security.

Customary abbreviations may be used in the name of a Holder or an assignee, such as TEN COM (=tenants in common), TEN ENT (=tenants by the entireties), JT TEN (=joint tenants with right of survivorship and not as tenants in common), CUST (=custodian), and U/G/M/A (=Uniform Gift to Minors Act).

The Company will furnish to any Holder upon written request and without charge a copy of the Indenture which has in it the text of this Security in larger type. Requests may be made to:

agent to transfer this Security on the books of the Company. The agent may substitute another to act for him.

To convert only part of this Security, state the Principal Amount to be converted (which must be $1,000 or an integral multiple of $1,000):

If you want the stock certificate made out in another person’s name, fill in the form below:


TIA Section		Indenture Section
310(a)(1)		7.10
(a)(2)		7.10
(a)(3)		N.A.
(a)(4)		N.A.
(b)		7.08; 7.10
(c)		N.A.
311(a)		N.A.
(b)		N.A.
(c)		N.A.
312(a)		2.05
(b)		12.03
(c)		12.03
313(a)		7.06
(b)(1)		N.A.
(b)(2)		7.06
(c)		12.02
(d)		7.06
314(a)		4.02; 4.03; 12.02
(b)		N.A.
(c)(1)		12.04
(c)(2)		12.04
(c)(3)		N.A.
(d)		N.A.
(e)		12.05
(f)		N.A.
315(a)		7.01
(b)		7.05; 12.02
(c)		7.01
(d)		7.01
(e)		6.11
316(a) (last sentence)		2.08
(a)(1)(A)		6.05
(a)(1)(B)		6.04
(a)(2)		N.A.
(b)		6.07
317(a)(1)		6.08
(a)(2)		6.09
(b)		2.04
318(a)		12.01


		Page

ARTICLE 1 DEFINITIONS AND INCORPORATION BY REFERENCE

Section 1.01.	Definitions	1
Section 1.02.	Other Definitions	8
Section 1.03.	Incorporation by Reference of Trust Indenture Act	8
Section 1.04.	Rules of Construction	9
Section 1.05.	Acts of Holders	9

ARTICLE 2 THE SECURITIES

Section 2.01.	Form and Dating	10
Section 2.02.	Execution and Authentication	12
Section 2.03.	Registrar, Paying Agent and Conversion Agent	13
Section 2.04.	Paying Agent to Hold Money and Securities in Trust	13
Section 2.05.	Securityholder Lists	13
Section 2.06.	Transfer and Conversion	14
Section 2.07.	Replacement Securities	15
Section 2.08.	Outstanding Securities; Determinations of Holders’ Action	15
Section 2.09.	Temporary Securities	16
Section 2.10.	Cancellation	17
Section 2.11.	Persons Deemed Owners	17
Section 2.12.	Legend; Additional Transfer and Exchange Requirements	17
Section 2.13.	CUSIP Numbers	23

ARTICLE 3 PURCHASES

Section 3.01.	Purchase of Securities at Option of the Holder Upon Change in Control	23
Section 3.02.	Effect of Change in Control Purchase Notice	26
Section 3.03.	Deposit of Change in Control Purchase Price	27
Section 3.04.	Securities Purchased in Part	27
Section 3.05.	Covenant to Comply With Securities Laws Upon Purchase of Securities	27
Section 3.06.	Repayment to the Company	27

ARTICLE 4 COVENANTS

Section 4.01.	Payment of Securities	28
Section 4.02.	SEC and Other Reports	28
Section 4.03.	Compliance Certificate	29
Section 4.04.	Maintenance of Office or Agency	29



ARTICLE 5 SUCCESSOR CORPORATION

Section 5.01.	When Company May Merge or Transfer Assets	29

ARTICLE 6 DEFAULTS AND REMEDIES

Section 6.01.	Events of Default	30
Section 6.02.	Acceleration	32
Section 6.03.	Other Remedies	32
Section 6.04.	Waiver of Past Defaults	32
Section 6.05.	Control by Majority	33
Section 6.06.	Limitation on Suits	33
Section 6.07.	Rights of Holders to Receive Payment	33
Section 6.08.	Collection Suit by Trustee	34
Section 6.09.	Trustee May File Proofs of Claim	34
Section 6.10.	Priorities	34
Section 6.11.	Undertaking for Costs	35
Section 6.12.	Waiver of Stay, Extension or Usury Laws	35

ARTICLE 7 TRUSTEE

Section 7.01.	Duties of Trustee	35
Section 7.02.	Rights of Trustee	37
Section 7.03.	Individual Rights of Trustee	38
Section 7.04.	Trustee’s Disclaimer	38
Section 7.05.	Notice of Defaults	39
Section 7.06.	Reports by Trustee to Holders	39
Section 7.07.	Compensation and Indemnity	39
Section 7.08.	Replacement of Trustee	40
Section 7.09.	Successor Trustee by Merger	41
Section 7.10.	Eligibility; Disqualification	41

ARTICLE 8 DISCHARGE OF INDENTURE

Section 8.01.	Discharge of Liability on Securities	41
Section 8.02.	Repayment to the Company	41

ARTICLE 9 AMENDMENTS

Section 9.01.	Without Consent of Holders	42
Section 9.02.	With Consent of Holders	42
Section 9.03.	Compliance with Trust Indenture Act	43
Section 9.04.	Revocation and Effect of Consents, Waivers and Actions	43
Section 9.05.	Notation on or Exchange of Securities	43
Section 9.06.	Trustee to Sign Supplemental Indentures	44
Section 9.07.	Effect of Supplemental Indentures	44



ARTICLE 10 CONVERSION

Section 10.01.	Conversion Privilege	44
Section 10.02.	Conversion Procedure	45
Section 10.03.	Fractional Shares	46
Section 10.04.	Taxes on Conversion	46
Section 10.05.	Company to Provide Stock	46
Section 10.06.	Adjustment for Change in Capital Stock	47
Section 10.07.	Adjustment for Rights Issue	47
Section 10.08.	Adjustment for Other Distributions	48
Section 10.09.	Adjustment for Cash Dividends	51
Section 10.10.	Adjustment for Tender Offer	51
Section 10.11.	Adjustment to Conversion Rate Upon Change in Control Transactions	52
Section 10.12.	When Adjustment May Be Deferred	53
Section 10.13.	When No Adjustment Required; Conversion Rate Cap	53
Section 10.14.	Notice of Adjustment	54
Section 10.15.	Notice of Certain Transactions	54
Section 10.16.	Reorganization of Company; Special Distributions	54
Section 10.17.	Company Determination Final	55
Section 10.18.	Trustee’s Adjustment Disclaimer	55
Section 10.19.	Simultaneous Adjustments	56
Section 10.20.	Successive Adjustments	56
Section 10.21.	Rights Issued in Respect of Common Stock Issued Upon Conversion	56
Section 10.22.	Withholding Taxes for Adjustments in Conversion Rate	56
Section 10.23.	Exchange in Lieu of Conversion	56

ARTICLE 11 PAYMENT OF INTEREST

Section 11.01.	Interest Payments	57
Section 11.02.	Defaulted Interest	58
Section 11.03.	Interest Rights Preserved	59

ARTICLE 12 MISCELLANEOUS

Section 12.01.	Trust Indenture Act Controls	59
Section 12.02.	Notices; Address of Agency	59
Section 12.03.	Communication by Holders with Other Holders	61
Section 12.04.	Certificate and Opinion as to Conditions Precedent	61
Section 12.05.	Statements Required in Certificate or Opinion	61
Section 12.06.	Separability Clause	62
Section 12.07.	Rules by Trustee, Paying Agent, Conversion Agent and Registrar	62
Section 12.08.	Calculations	62
Section 12.09.	Legal Holidays	62
Section 12.10.	Governing Law	63
Section 12.11.	No Recourse Against Others	63
Section 12.12.	Successors	63
Section 12.13.	Multiple Originals	63


Term		Defined in Section
“Act”		1.05
“Agent Members”		2.12(e)
“Cash Percentage”		10.01
“Cash Percentage Notice”		10.01
“Change in Control”		3.01(a)
“Change in Control Effective Date”		10.11
“Change in Control Purchase Date”		3.01(a)
“Change in Control Purchase Notice”		3.01(c)
“Change in Control Purchase Price”		3.01(a)
“Conversion Agent”		2.03(a)
“Defaulted Interest”		11.02
“Event of Default”		6.01
“Ex-Dividend Date”		10.08(b)
“Ex-Dividend Time”		Definition of “Time of Determination”
“Expiration Time”		10.10
“Financial Institution”		10.23
“Initial Purchasers”		2.01
“Legal Holiday”		12.09
“Legend”		2.12(a)
“Make-Whole Shares”		10.11
“Notice of Default”		6.01
“Paying Agent”		2.03(a)
“Post-Distribution Price”		10.08(b)
“Protected Purchaser”		2.07
“Purchase Agreement”		2.01
“Purchased Shares”		10.10
“Registrar”		2.03(a)
“Remaining Shares”		10.01
“Required Cash Amount”		10.01
“Resale Restriction Termination Date”		2.12(f)
“Rights”		10.21
“Rights Plan”		10.21
“Stock Price”		10.11


	Effective Date
Stock Price on Effective Date	April 25, 2006	May 1, 2007	May 1, 2008	May 1, 2009	May 1, 2010	May 1, 2011
$65.13	2.4515	2.4515	2.4515	2.4515	2.4515	2.4515
$70.00	2.0073	2.0159	1.9915	1.9203	1.7426	1.3833
$75.00	1.6464	1.6279	1.5708	1.4586	1.2215	0.4309
$80.00	1.3605	1.3223	1.2444	1.1092	0.8465	0.0000


TRUSTEE’S CERTIFICATE OF AUTHENTICATION

Wells Fargo Bank, National Association, as Trustee, certifies that this is one of the Securities referred to in the within-mentioned Indenture.

By:
		Authorized Officer


	Effective Date
Stock Price on Effective Date	April 25, 2006	May 1, 2007	May 1, 2008	May 1, 2009	May 1, 2010	May 1, 2011
$85.00	1.1324	1.0814	0.9906	0.8457	0.5816	0.0000
$90.00	0.9483	0.8895	0.7932	0.6467	0.3977	0.0000
$95.00	0.7997	0.7366	0.6387	0.4969	0.2717	0.0000
$100.00	0.6784	0.6135	0.5169	0.3839	0.1861	0.0000
$125.00	0.3264	0.2719	0.1999	0.1194	0.0383	0.0000
$150.00	0.1794	0.1416	0.0985	0.0623	0.0314	0.0000
$175.00	0.1196	0.1001	0.0773	0.0529	0.0262	0.0000
$200.00	0.1064	0.0878	0.0676	0.0460	0.0225	0.0000
$250.00	0.0855	0.0703	0.0542	0.0370	0.0193	0.0000


No.		CUSIP: 375558AE3
Issue Date:
Principal Amount:



Date:						Your Signature: