James Watson (1960s)
James Watson and Francis Crick, Cambridge University, 1953
1953 picture of Francis Crick (L) and James Watson (R) walking along the backs of King's College in Cambridge.
DNA base pairs
The DNA molecule is shaped like a twisted ladder.
James Watson and Francis Crick developed the idea to explain how DNA and RNA related in protein production.
DNA as a regular, repeating structure -- a helix.
DNA as a double helix.
Figuring out the base pairing.
The importance of DNA, not proteins, as a genetic molecule.
Linus Pauling's triple-helix model for DNA and the reaction to this incorrect model.