Yale Univer sity New Haven, Connecticut 06510

SCHOOL OF MEDICINE
333 Cedar Street

Department of Human Genetics

June 23, 1975

Dr. Edward L. Tatrun
Rockefeller University
New York, N.Y. 10021

Dear Ed:

Bill Ogata mentioned to me that you will be leaving Rockefeller soon
and that you have some old E. coli stocks which you would like to deposit
in the E. coli Genetic Stock Center. Unfortunately, he told me this just
as I was leaving for Europe for six weeks on a trip to collect strains and
pedigrees, so that this is the first opportunity that I have had to respond
to this suggestion. On calling your laboratory yesterday, I discovered that
you are now in Europe for a month. I hope that we can arrange to discuss
these strains, however briefly, upon your returm.

I am hoping that you still have cultures of some of the earliest
E. coli K-12 mutants available. If so, I would very much appreciate
receiving them for the Stock Center collection. Josh Lederberg was able
to supply us with only a few of the early Yale and Stanford mutants. For
example, we do not have the strains 58, 679 or 679-680, which we certainly
should have.

If there is time when you return, I would be happy to come down and
look over the strains. If this is not possible, perhaps you could ask
someone to send me a list of what is in the collection.

I understand that you are moving back to California. This should be
‘a pleasant change from New York City, and I wish you every happiness there.

With best regards,
j2 fs
Barbara J. Bachmann

BJB/ph