EXHIBIT 23.2

NOTICE REGARDING CONSENT OF ARTHUR ANDERSEN LLP

Section 11(a) of the Securities Act of 1933, as amended (the Securities Act),
provides that if any part of a registration statement at the time such part
becomes effective contains an untrue statement of a material fact or an omission
to state a material fact required to be stated therein or necessary to make the
statements therein not misleading, any person acquiring a security pursuant to
such registration statement (unless it is proved that at the time of such
acquisition such person knew of such untruth or omission) may sue, among others,
every accountant who has consented to be named as having prepared or certified
any part of the registration statement, or as having prepared or certified any
report or valuation which is used in connection with the registration statement,
with respect to the statement in such registration statement, report or
valuation which purports to have been prepared or certified by the accountant.

This Annual Report on Form 10-K is incorporated by reference into Repligen
Corporation Registration Statement filings Nos. 33-106109, 33-62796, 333-30383,
333-57951, 333-76005, 333-79611, 333-95641, 333-31728, 333-35056, 333-89140 and
333-36280 (collectively, the "Registration Statements") and, for the purposes of
determining any liability under the Securities Act, is deemed to be a new
registration statement for each Registration Statement into which it is
incorporated by reference.

On June 12, 2002, Repligen Corporation dismissed Arthur Andersen LLP as its
independent auditor and appointed Ernst & Young LLP to replace Arthur Andersen
LLP. Subsequent to that date, Arthur Andersen LLP has ceased operations. As a
result, Repligen Corporation has been unable to obtain Arthur Andersen LLP's
written consent to the incorporation by reference into the Registration
Statements of its audit report with respect to Repligen Corporation's financial
statements as of March 31, 2002 and each of the two years in the period ended
March 31, 2002. Under these circumstances, Rule 437a under the Securities Act
permits Repligen Corporation to file this Annual Report on Form 10-K for the
year ended March 31, 2003 without a written consent from Arthur Andersen LLP.
However, Arthur Andersen LLP's lack of consent could effect Arthur Andersen
LLP's potential liability under Section 11(a) of the Securities Act for any
untrue statements of a material fact contained in the financial statements
audited by Arthur Andersen LLP or any omissions of a material fact required to
be stated therein. Accordingly, a person's ability to assert a claim against
Arthur Andersen LLP under Section 11(a) of the Securities Act for any purchases
of securities under the Registration Statements made on or after the date of
this Annual Report on Form 10-K may be impaired. To the extent provided in
Section 11(b)(3)(C) of the Securities Act, however, other persons who are liable
under Section 11(a) of the Securities Act, including the Company's officers and
directors, may still rely on Andersen's original audit reports as being made by
an expert for purposes of establishing a due diligence defense under Section
11(b) of the Securities Act.