CARNEGIE INSTITUTION OF WASHINGTON

DEPARTMENT OF GENETICS

COLD SPRING HARBOR, LONG ISLAND, N. Y.

February 17, 1955

Professor Joshua Lederberg
Department of Genetics

The University of Wisconsin
Madison 6, Wisconsin

Dear Joshua:

I am sorry to hear that you did not have any luck in finding linkage
between your material and the markers we sent you. However, we here are
not much surprised at this, since we have not discovered any more linkages
between the markers we have. It must have been sheer luck that we found
the first linkage between tryptophane and cystine-and-methionine.

My last letter was sent to you before the lysates were shipped, and
at that time it was thought that we would not have enough glass vials to
mail everything we wanted to, but a sufficient number of vials was located
in various corners so that it was possible to send representetives of each
group. We still have a few lysates available, but these are of markers
that are closely linked with some you already have, If you would like to
try these, we will be glad to ship them to you.

With best regards,

Sincerely yours,

/ WRAMEE<

MD:af M. Demerec