4QR8:
reference: Structural basis of substrate selectivity of E. coli prolidase., Weaver J, Watts T, Li P, Rye HS, PLoS One. 2014 Oct 29;9(10):e111531. doi: 10.1371/journal.pone.0111531., eCollection 2014. PMID: 25354344

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