He extracted and observed DNA from white blood cells.
James Watson and Francis Crick's discovery of the double helix structure of DNA in 1953 [1] and subsequent cracking of the genetic code [2] marked a sea change in the life sciences. One of the most important discoveries of the 20th century was the deciphering of the genetic code.
In order to encode the 20 conventional amino acids that living cells need to make proteins, he proposed using sets of three bases (triplets), which would allow a maximum of 43 = 64 amino acids. The initial genetic code, DNA-protein interaction, was given the moniker "diamond code" by him.
The double-helix structure of DNA was jointly discovered by Crick, Franklin, Watson, and Wilkins, and served as the inspiration for contemporary biotechnology.
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