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Francis Crick and Maurice Wilkins, together with James Watson, describe the double-helix structure of DNA. The chemical structure is based on X-ray crystallography of DNA done by Rosalind Franklin. Crick, Wilkins and Watson are awarded the Nobel Prize in Medicine or Physiology in 1962.

More Information:

DNA Helix Turns 40, ASM News 60,1994. p.28 [pdf]