4BP8:
reference: Crystal structures of Trypanosoma brucei oligopeptidase B broaden the paradigm of catalytic regulation in prolyl oligopeptidase family enzymes., Canning P, Rea D, Morty RE, Fulop V, PLoS One. 2013 Nov 12;8(11):e79349. doi: 10.1371/journal.pone.0079349., eCollection 2013. PMID: 24265767

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).