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In this letter Khorana conveyed some of the results of his work on phenylalanine tRNA in yeast and on repeating sequences of GUA, the codon for the amino acid valine.
Original Repository:
The Wellcome Library for the History and Understanding of Medicine. Francis Harry Compton Crick Papers
Original Repository. Wellcome Library for the History and Understanding of Medicine. Francis Harry Compton Crick Papers. 11646. URL. http://archives.wellcome.ac.uk/