3C4O:
reference: Computational redesign of the SHV-1 beta-lactamase/beta-lactamase inhibitor protein interface., Reynolds KA, Hanes MS, Thomson JM, Antczak AJ, Berger JM, Bonomo RA, Kirsch JF, Handel TM, J Mol Biol. 2008 Oct 24;382(5):1265-75. Epub 2008 May 29. PMID: 18775544

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