1 [WILSON SONSINI GOODRICH & ROSATI LETTERHEAD] March 27, 1998 Securities and Exchange Commission 450 Fifth Street, N.W. Washington, D.C. 20549 Attention: Filing Desk, Mail Stop 1-4 Re: JENNER TECHNOLOGIES, INC. REGISTRATION STATEMENT ON FORM S-1 Ladies and Gentlemen: On behalf of Jenner Biotherapies, Inc., a Delaware corporation and successor to Jenner Technologies, Inc., a California corporation (the "Company"), we hereby withdraw the Company's Registration Statement on Form S-1 filed with the Commission on February 19, 1997 (SEC File Number 333-22039). Please contact Blair W. Stewart, Jr. or me if you have any questions regarding the above. Very truly yours, WILSON SONSINI GOODRICH & ROSATI Professional Corporation /s/ LINDA M. CUNY ----------------- Linda M. Cuny cc: Anthony E. Maida, III Blair W. Stewart, Jr., Esq. Raj Aji, Esq.