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In this letter Crick referred to work in Khorana's laboratory on alanine tRNA in yeast and in the bacterium E-coli, as well as on the TAG codon in DNA, which becomes UAG during transcription into RNA and which codes for the termination of a polypeptide chain.
Original Repository:
The Wellcome Library for the History and Understanding of Medicine. Francis Harry Compton Crick Papers
Location:
Box: 9. Folder: PP/CRI/D/1/1/11
Rights:
Reproduced with permission of the Wellcome Library for the History and Understanding of Medicine. and http://library.wellcome.ac.uk/
Original Repository. Wellcome Library for the History and Understanding of Medicine. Francis Harry Compton Crick Papers. 11646. URL. http://archives.wellcome.ac.uk/