2QIY:
reference: Molecular basis for bre5 cofactor recognition by the ubp3 deubiquitylating enzyme., Li K, Ossareh-Nazari B, Liu X, Dargemont C, Marmorstein R, J Mol Biol. 2007 Sep 7;372(1):194-204. Epub 2007 Jun 27. PMID: 17632125

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