THE FLEISCHMANN LABORATORIES

FOR THE INVESTIGATION OF FERMENTATION
AND FOR INDUSTRIAL RESEARCH

STANDARD BRANDS INCORPORATED

BETTS AVENUE

STAMFORD, CONN.

Dr, Joshua Lederberg
Dept, of Genetics
University of Wisconsin
Madison, Wisconsin

Dear Josh:

December 10, 1953

I have sent you via "Airmail" the following lyophilized

cultures from my collection;

! No, 62 MT a,

No, 63 MT g,.

No, 62-20-19, MT a,

y No, 67-1 MT g,

prototreph
prototroph
requires tryptophan and uracil
requires methionine and adenine

I hope these cultures will satisfy your needs, and will

behave as labeled,

All best wishes,

Sincerely yours,

Pomper