UNIVERSITY of PENNSYLVANIA

PHILADELPHIA 4

The School of Medicine

———_ 24 December 1957
THE ELDRIDGE REEVES JOHNSON 4 Please Hee reply to:
FOUNDATION FOR MEDICAL RESEARCH 612 Maloney Building
Dear Josh,

I'm enclosing the detailed analysis of clones
from fertile exconjugants you asked for some time
ago. The seven symbols indicating recombinant types
are in the order T, L. Az, T5, Lac, Gal, and Motility,
+ for the Hfr and ~ for the F= strain.

Since I'm also ineluding a brief discussion of
your data, I'd avoreciate knowing whether I've gotten
your numbers right.

Best wishes to you and Esther for the Holidays!

Sincerely,

SS

Thomas F, Anderson