5T88:
reference: Crystal Structure and Conformational Dynamics of Pyrococcus furiosus Prolyl Oligopeptidase., Ellis-Guardiola K, Rui H, Beckner RL, Srivastava P, Sukumar N, Roux B, Lewis JC, Biochemistry. 2019 Mar 26;58(12):1616-1626. doi: 10.1021/acs.biochem.9b00031., Epub 2019 Mar 5. PMID: 30786206

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