From the Laboratory of the

INSTITUTE OF MOLECULAR EVOLUTION

UNIVERSITY OF MIAMI

921 ANASTASIA
CORAL GABLES, FLORIDA 33134

28 June 1965

Dr. Joshua Lederberg

Department of Genetics

Stanford University Medical Center
Palo Alto, Calif.

Dear Josh:

In some conversations of last summer you expressed
interest in variability of sequence in proteins and in thermal
proteinoids. Related to those considerations, we have been
finding an astonishingly high degree of uniformity in composition
in various fractions from DEAE-cellulose, and a new indication
of sequential uniformity as well. Those data have been reviewed
with F. Sanger, T. Wieland, etc. Iam sending some of the data
in the event that you may find them of interest.

Sincerely,

x~

Se

SWF :vb Sidney W. Fox
Enclosures

JUN 3-0 1968

XO4's