3PVM:
reference: Substrate recognition by complement convertases revealed in the C5-cobra venom factor complex., Laursen NS, Andersen KR, Braren I, Spillner E, Sottrup-Jensen L, Andersen GR, EMBO J. 2011 Jan 7. PMID: 21217642

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