3CJK:
reference: Copper(I)-mediated protein-protein interactions result from suboptimal interaction surfaces., Banci L, Bertini I, Calderone V, Della-Malva N, Felli IC, Neri S, Pavelkova A, Rosato A, Biochem J. 2009 Jul 29;422(1):37-42. PMID: 19453293

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