1ASZ:
reference: The active site of yeast aspartyl-tRNA synthetase: structural and functional aspects of the aminoacylation reaction., Cavarelli J, Eriani G, Rees B, Ruff M, Boeglin M, Mitschler A, Martin F, Gangloff J, Thierry JC, Moras D, EMBO J 1994 Jan 15;13(2):327-37. PMID: 8313877

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