POWER OF ATTORNEY


	Know all by these presents, that the undersigned hereby authorizes
David E. Sweet, Robert Yin, Patricia Tom, Tench Coxe, David L. Anderson,
James C. Gaither, Gregory P. Sands, James N. White, or William H. Younger, Jr.
to execute for and on behalf of the undersigned, in the undersigned's capacity
as a director of Praecis Pharmaceuticals, Inc. ("the Company"), Forms 3, 4,
and 5, and any Amendments thereto, and cause such form(s) to be filed with
the United States Securities and Exchange Commission pursuant to Section
16(a) of the Securities Act of 1934, relating to the undersigned's beneficial
ownership of securities in the Company.  The undersigned hereby grants to
each such attorney-in-fact full power and authority to do and perform any and
every act and thing whatsoever requisite, necessary, or proper to be done in
the exercise of any of the rights and powers herein granted, as fully to all
intents and purposes as the undersigned might or could do if personally
present, with full power of substitution or revocation, hereby ratifying and
confirming all that such attorney-in-fact, or such attorney-in-fact's
substitute or substitutes, shall lawfully do or cause to be done by virtue of
this power of attorney and the rights and powers herein granted.  The
undersigned acknowledges that the foregoing attorneys-in-fact, in serving in
such a capacity at the request of the undersigned, are not assuming, nor is
the Company assuming, any of the undersigneds responsibilities to comply with
Section 16 of the Securities Exchange Act of 1934.
	This Power of Attorney shall remain in full force and effect until
the undersigned is no longer required to file Forms 3, 4, and 5 with respect
to the undersigned's holdings of, and transactions in, securities issued by
the Company, unless earlier revoked by the undersigned in a signed writing
delivered to the foregoing attorneys-in-fact.
	In witness whereof, the undersigned has caused this Power of
Attorney to be executed as of this 25th day of June, 2003.



					/s/  G. Leonard Baker, Jr.