UNIVERSITY OF CALIFORNIA

    COLLEGE OF AGRICULTURE
AGRICULTURAL EXPERIMENT STATION

DEPARTMENT OF BOTANY
405 HILGARD AVENUE
LOS ANGELES 24, CALIFORNIA

3r. R. Franklin
Birkbeck College
University of London
London, England

Dear Miss Franklin,

It was indeed a pleasure to meet you on your recent

visit to this country.  You expressed a desire to examine some
strains of THV which differ appreciably from the common strain.
I am, therefore, sending you a sample of our U2 strain which differs
from the common strain in quite a number of properties, some of which
are described in a paper which I am sending under separate cover,

The sample consists of 10 cc containing 17 mg virus per cc,

It is made up in 0.1 ionic strength cacodylic acid buffer which is
0.08 M NaC1.
changes of water in order to get rid of the salts, should you so desire.

You need only dialyze this solution through several

We would appreciate learning of any progress that you

might make with this material..
whether any of the differences that we have observed between strains
is correlated with differences in the structure of the molecules.

It would be interesting to find out