2Z3W:
reference: Novel inhibitor for prolyl tripeptidyl aminopeptidase from Porphyromonas gingivalis and details of substrate-recognition mechanism., Xu Y, Nakajima Y, Ito K, Zheng H, Oyama H, Heiser U, Hoffmann T, Gartner UT, Demuth HU, Yoshimoto T, J Mol Biol. 2008 Jan 18;375(3):708-19. Epub 2007 Oct 3. PMID: 18042490

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