DEPARTMENT OF CHEMISTRY
YALE UNIVERSITY NEW HAVEN,
CONNECTICUT
STERLING CHEMISTRY LABORATORY 225
PROSPECT STREET
12 March 1958
Dr. Linus Pauling
Department of Chemistry
California Institute of Technology
Pasadena 4, California
Dear Linus:
Harvey Itano and I have been collaborating recently on some further studies with normal
and sickle hemoglobins, concerning their dissociation and association in acid solutions.
We find that mixtures of A, S, and C hemoglobins, dissociated and then re-associated,
form no electrophoretically distinct hybrids. We thought that you would be interested
in these results and are enclosing a manuscript which we are about to submit to Proc.
Nat. Acad. Sci. [handwritten: "to WAS 2/31/58"]
Both Harvey and I are planning to attend the San Francisco A.C.S. meeting next month,
and Ruth and I hope to spend a little time with her folks in Sierra Madre before the
meeting. I will drop in then and visit.
We are all very excited by the density gradient sedimentation studies, which are certainly
beautiful. Frank Stahl visited Yale a few weeks ago, and we had a stimulating time.
With best regards, and looking forward to seeing you
Sincerely,
S. J. Singer
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