1EI5:
reference: Crystal structure of a D-aminopeptidase from Ochrobactrum anthropi, a new member of the 'penicillin-recognizing enzyme' family., Bompard-Gilles C, Remaut H, Villeret V, Prange T, Fanuel L, Delmarcelle M, Joris B, Frere J, Van Beeumen J, Structure Fold Des 2000 Sep 15;8(9):971-80. PMID: 10986464

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