3KT8:
reference: Crystal structures of Saccharomyces cerevisiae tryptophanyl-tRNA synthetase: new insights into the mechanism of tryptophan activation and implications for anti-fungal drug design., Zhou M, Dong X, Shen N, Zhong C, Ding J, Nucleic Acids Res. 2010 Jan 31. PMID: 20123733

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