| ge

De Meluve Cole:

THE SALK INSTITUTE FOR BIOLOGICAL STUDIES
POST OFFICE BOX 9499, SAN DIEGO 9, CALIFORNIA

APR 6 1964

April 2, 1964.

Dr. Joshua Lederberg,
Department of Genetics,
Stanford University,
School of Medicine,

Palo Alto, California. 7 _
Dear Josh: S io 202]

In all of the excitement of my visit to Stanford, |! forgot to
ask you if | may have the strain of B.subtli#s used by you for
transformation. We have been carrying out experiments fn which
we tried to transform animal cells with nucleic acid derived from
immunized animals. Our results have been pluseminus for some
time, making us continue in a tantalizing fashion. Since some-
body in Germany is supposed to have put vaccinia virus into
subtligs, | am encouraged to try to transform subtli¢s with
animal nucleic acid.

1 would appreciate it if I could have the strain as well as
a collection of your reprints on the transformation so that |
may choose the best conditions. 1! know that this is a swift
pain to send out strains but | really have kept my requests
to a minimum.

It was very nice seeing you last week, and we hope to arrange
for you to spend some time here with us.

Best,

Mee

Mel

lL 40 D