3EDR:
reference: Structural basis for executioner caspase recognition of P5 position in substrates., Fu G, Chumanevich AA, Agniswamy J, Fang B, Harrison RW, Weber IT, Apoptosis. 2008 Nov;13(11):1291-302. PMID: 18780184

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