2PBK:
reference: Substrate modulation of enzyme activity in the herpesvirus protease family., Lazic A, Goetz DH, Nomura AM, Marnett AB, Craik CS, J Mol Biol. 2007 Nov 2;373(4):913-23. Epub 2007 Aug 16. PMID: 17870089

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