1AZW:
reference: Structure of proline iminopeptidase from Xanthomonas campestris pv. citri: a prototype for the prolyl oligopeptidase family., Medrano FJ, Alonso J, Garcia JL, Romero A, Bode W, Gomis-Ruth FX, EMBO J 1998 Jan 2;17(1):1-9. PMID: 9427736

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