MERCK &CO,,INC.

RAHWAY, N. J.

RESEARCH & DEVELOPMENT DIVISION July 9, 1948

Dr. Joshua Lederberg

Assistant Professor of Genetics
The University of Wisconsin
Madison 6, Wisconsin

Dear Dr. Lederberg:

In response to your letter of July 2,
we regret that we have no 5=methyltryptophane
and do not know where it can be obtained.

Sincerely yours,

ov
J. fC. Woodruff

Director, Microbiological Research

JICW/ jef