September 24, 1956

Profeasor P. D. Boyer

Dept. Physiological Chemistry
University of Minnesota
Minneapolis 14, Minn.

Dear Professor Boyer:

I wish I knew what "K123" was! I have distributed a number of lambda-
sensitive mtants, with various genetic backgrounds, for different purposes
under specific stock labels. Unfortunately, the admonition on the attached
slip has sometimes been overlooked.

However, I am sending W-1485 (history as given in Genetics 38: p. 55) as
one possibility, and likely to be of equal use. [It should be a chnvention
that oitherva specific citation, or a history, be published for any cultures
used in physiological studies. ]

May I recommend that you visit with Dr. S. G. Bradley in your Bacteriology
department if you have any other requirements— Dr? Bradley spent two years
here as a postdoctoral fellow, and inter alia, may be helpful with some of a
group of stocks he brought with hiz.

Yours sincere

 
  
   

a Lederberg
fessor of Geneti