1IGB:
reference: The structure of the Aeromonas proteolytica aminopeptidase complexed with a hydroxamate inhibitor. Involvement in catalysis of Glu151 and two zinc ions of the co-catalytic unit., Chevrier B, D'Orchymont H, Schalk C, Tarnus C, Moras D, Eur J Biochem 1996 Apr 15;237(2):393-8. PMID: 8647077

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