2QS8:
reference: Functional annotation of two new carboxypeptidases from the amidohydrolase superfamily of enzymes., Xiang DF, Xu C, Kumaran D, Brown AC, Sauder JM, Burley SK, Swaminathan S, Raushel FM, Biochemistry. 2009 Jun 2;48(21):4567-76. PMID: 19358546

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