The Wellcome Library for the History and Understanding of Medicine. Francis Harry Compton Crick Papers
Crick, Francis, 1916-2004
Watson, James D., 1928-
After the discovery of the DNA double helix and his return to the United States, Watson turned to study the structure of ribonucleic acid (RNA), the single-stranded companion molecule to DNA which he and Crick recognized to be the key intermediary in protein synthesis. Watson here reported his first measurements of the dimensions of the RNA molecule and speculated that it might be a helix, but admitted that resolving the structure of RNA "is obviously a much tougher puzzle than DNA" (p.2).
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