1QNJ:
reference: Atomic resolution structure of native porcine pancreatic elastase at 1.1 A., Wurtele M, Hahn M, Hilpert K, Hohne W, Acta Crystallogr D Biol Crystallogr 2000 Apr;56 ( Pt 4):520-3. PMID: 10739939

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