3GLJ:
reference: Analysis of a new crystal form of procarboxypeptidase B: further insights into the catalytic mechanism., Fernandez D, Boix E, Pallares I, Aviles FX, Vendrell J, Biopolymers. 2009 Oct 2. PMID: 19802820

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