INST. FOR CELLFORSKNING OCH GENETIK
MEDICINSKA NOBELINSTITUTET
KAROLINSKA INSTITUTET
STOCKHOLM 60
Telefon 23 54 80

INST. FOR CELL RESEARCH AND GENETICS
KAROLINSKA INSTITUTET
STOCKNIOLM 60 April 25, 1957
Professor Joshua Lederberg
Denartment of Medical Genetics
Madison 5, Wis.
U.S.A.

Dear Joshua:

Thanke for your letter. Your suc-cestion of
the nossible inclusion of one element of the neonlastic
transformation itself in the neighborhood of a marker on
the H-2 chromosome is very interestine and certainly Je-
serves further consideration, Fresently we try to collect
ag much dsta as we can on a veriety of “ifferent turors

of similar origin.

Than*s you for your revested zint invitation
to visit Kadison in June. Jothine would delizht me ore
and I gnall certainly reserve my time accordingly. But
olease jo not nave too much trouble for yourself with

the 3rrancetrents,

I noticed that your dJevartrent hes chunred
name to Nedical Genetics 2nd I understand from your letter
that this has been established as a new dJevartrent. I
should certainly like to congratulate you to this an4 wish
you all good luck to it, which, unter the clrounstance
may really seam auite unnecessary. I am very glad to heer
that you sre interested in jevelopmente rervarding somatia
cell genetics. I enclose a brie? statement shout Mitehiagon
for whom I h:ve » very high recard. I have never tet hig
pergonaily cut peovle at Far Harbor (where he worre? for
some time} heave sooken very fevorably of him, doth scten-
tifically and personally.

with kindest rerards,

sincerely yours,

f RA TR
ceorze Klein