Exhibit 25.1

FORM T-1

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Statement of Eligibility Under

The Trust Indenture Act of 1939 of a Corporation

Designated to Act as Trustee

U.S. BANK NATIONAL ASSOCIATION

(Exact name of trustee as specified in its charter)

31-0841368

(I.R.S. Employer Identification No.)

225 South Sixth Minneapolis, MN	55402
(Address of principal executive offices)	(Zip code)

Claude Acoba

U.S. Bank National Association

One California Street, Suite 2100

San Francisco, CA 94111

Telephone 415-473-4563

Cerus Corporation

Delaware	68-0262011
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

2411 Stanwell Drive Concord, California	94520
	(Zip code)

$200,000,000

Common Stock, Preferred Stock,

Debt Securities,

Warrants and Units

1. General Information. Furnish the following information as to the trustee—

(a) Name and address of each examining or supervising authority to which it is subject.

Comptroller of the Currency, Washington D.C. 20521

(b) Whether it is authorized to exercise corporate trust powers.

Yes.

2. Affiliations with Obligor and Underwriters. If the obligor or any underwriter for the obligor is an affiliate of the trustee, describe each such affiliation.

No such affiliation exists with the Trustee, U.S. Bank National Association.

Items 3-15 are not applicable because to the best of the Trustee’s knowledge the obligor is not in default under any Indenture for which the Trustee acts as Trustee.

16. List of Exhibits. List below all exhibits filed as a part of this statement of eligibility and qualification.

1. Articles of Association of U.S. Bank National Association.⁽¹⁾

2. Certificate of Authority of U.S. Bank National Association to Commence Business.⁽¹⁾

3. Authorization of the trustee to exercise corporate trust powers.⁽¹⁾

4. Bylaws of U.S. Bank National Association.⁽¹⁾

5. Not Applicable.

6. Consents of U.S. Bank National Association required by Section 321(b) of the Act.⁽²⁾

7. Latest Report of Condition of U.S. Bank National Association.⁽³⁾

(1) Incorporated by reference to the exhibit of the same number to the Form T-1 filed with registration statement number 333-67188.

(2) Attached.

(3) Incorporated by reference to registration statement number 22-22451.

SIGNATURE

Pursuant to the requirements of the Trust Indenture Act of 1939, the trustee, U.S. Bank National Association, a national banking association organized under the laws of the United States, has duly caused this statement of eligibility to be signed on its behalf by the undersigned, thereunto duly authorized, all in the City of San Francisco, and State of California, on October 28, 2008.

U.S. BANK NATIONAL ASSOCIATION
By	/s/ Francine Rockett
	Vice President

Exhibit 6

CONSENT OF THE TRUSTEE

Pursuant to the requirements of Section 321(b) of the Trust Indenture Act of 1939 in connection with the proposed issuance by Cerus Corporation, $200,000,000 Common Stock, Preferred Stock, Debt Securities, Warrants and Units, we hereby consent that reports of examinations by federal, state, territorial and district authorities may be furnished by such authorities to the Securities and Exchange Commission upon its request therefor.

U.S. BANK NATIONAL ASSOCIATION
By	/s/ Francine Rockett
	Vice President

Dated: October 28, 2008