4AN1:
reference: Molecular dynamics, crystallography and mutagenesis studies on the substrate gating mechanism of prolyl oligopeptidase., Kaszuba K, Rog T, Danne R, Canning P, Fulop V, Juhasz T, Szeltner Z, St Pierre JF, Garcia-Horsman A, Mannisto PT, Karttunen M, Hokkanen J, Bunker A, Biochimie. 2012 Jun;94(6):1398-411. Epub 2012 Mar 30. PMID: 22484394

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