Py

UNIVERSITY OF ILLINOIS

DEPARTMENT OF BACTERIOLOGY

362 NOYES LABORATORY OF CHEMISTRY
URBANA

Feb.8,1952

Dear Joshua:

I am mailing today a slant o8 sensitive
Shiga as requested.

I finally got uncuestionable recombination
in Pe, by surerinfecting lysogenic bacteria.
I do not know yet ff this occurs at liberation
or eee in the prophage stage or both.
Apparently there are interesting facts of selection
between different prophages carried by the
same strain.

Best regards to Esther.

Sincerely,

Jet