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, Watson put off a return to his previous field of research, bacterial viruses, in order 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. In this letter, Watson relayed his thoughts about how DNA specified the synthesis of RNA, namely by acting as a template, and whether one or both strands of DNA act as a template.
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