THE UNIVERSITY OF TEXAS

M. D. ANDERSON HOSPITAL

June 13, 1949

2310 BALDWIN STREET

Houston 6

Dr. J, Lederberg
Department of Genetics
University of Wisconsin
Madison, Wisconsin

Dear Doctor Lederberg:

I have received the six amino acid mutants and the Prototrovh
of Escherichia coli all of which you were so kind to send me. I al-
so found the reprint which was enclosed in the vackage and even tho
T had read the original article, found it to be quite useful for ny
reprint file.

I have transplanted all the cultures and all replants grew well,

I thank you very much for sending me the mutants and I hove my
request for them has not caused you too much inconvenience,

Please don't hesitate to write to me at any time when there is
anything I am able to do in return. Thanking you again, I renain

>

Very sincerel; yours,

Zs

abi facet

RF/rl Robert Fuerst /