Sept. ay a 9503
Jear Mrs. Adler:

Jh-13 is a galactose—negative; isoleucine~valineless mutant from a mono~
phasic 5. typhi-murium received from ?.%.Edwards. It was labelled as I IV V;-;1,2,3...

SY~36 is S. gallinarum received from E.K. Borman as "3045".

As we are now ourselves studying lysogenicity in an &. coli system, I will
be very pleased to hear your ultimate findings with these cultures.

Sincerely,

Joshua Lederberg
Associate ~rofessor of Genetics