UNIVERSITY OF MINNESOTA

Tue Mepicat ScHoou

Miyweaporis 14

DEPARTMENT OF PHYSIOLOGICAL CHEMISTRY October 1 ’ 1956

Professor Joshua Lederberg
Department of Genetics
College of Agriculture
University of Wisconsin
Madison 6, Wiswonsin

Dear Professor Lederberg:

If you don't know what "K12S" is, there is very
little likelihood that a biochemist like myself is
going to find out. I strongly suspect that your
wild-type culture which you sent will suffice for our
purposes and we are proceeding with our studies
accordingly.

Many thanks for your kind courtesy and help.
Yours sincerely,

tener"

Professor
PDB:ejb