1J1U:
reference: Structural basis for orthogonal tRNA specificities of tyrosyl-tRNA synthetases for genetic code expansion., Kobayashi T, Nureki O, Ishitani R, Yaremchuk A, Tukalo M, Cusack S, Sakamoto K, Yokoyama S, Nat Struct Biol 2003 Jun;10(6):425-32. PMID: 12754495

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