2VSL:
reference: Interaction of a Cyclic, Bivalent Smac Mimetic with the X-Linked Inhibitor of Apoptosis Protein., Nikolovska-Coleska Z, Meagher JL, Jiang S, Yang CY, Qiu S, Roller PP, Stuckey JA, Wang S, Biochemistry. 2008 Aug 22. PMID: 18717598

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