Letter from Rosalind Franklin to H. Fraenkel-Conrat
During her 1954 visit to the United States, Franklin met or renewed acquaintance with many virus researchers, who were able
to send samples of their virus material and brainstorm with her on her x-ray diffraction findings. Heinz Fraenkel-Conrat at
the UC Berkeley Virus Laboratory was especially helpful, sending a variety of heavy-atom substituted TMV preparations.
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1954-11-16 (November 16, 1954)
University of California, Berkeley
Original Repository: Churchill Archives Centre. The Papers of Rosalind Franklin
Reproduced from the Franklin Collection at the Churchill Archives Centre with the permission of the copyright holder.
When I got back I found my X-ray apparatus in need of considerable repair, so waited to write to you until it was in working
order. It is now working well, and I am writing to let you know that I should be extremely grateful for an opportunity to
study any heavy-atom derivative of T.M.V. at any time that you have any available. In particular, I think we agreed that
it would be useful to look first at T.M.V. with I in the -SH position. But any other derivative in which the foreign body
fixed is either present in large quantity or contains a heavy atom would be of interest.
I enjoyed very much the discussions which I had with you and your colleagues, and came away from Berkeley with plenty of fresh
ideas. I shall let you know later of any results that may emerge from them.