3EST:
reference: Structure of native porcine pancreatic elastase at 1.65 A resolutions., Meyer E, Cole G, Radhakrishnan R, Epp O, Acta Crystallogr B 1988 Feb 1;44 ( Pt 1):26-38. PMID: 3271103

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