1GVK:
reference: X-ray structure of a serine protease acyl-enzyme complex at 0.95-A resolution., Katona G, Wilmouth RC, Wright PA, Berglund GI, Hajdu J, Neutze R, Schofield CJ, J Biol Chem 2002 Jun 14;277(24):21962-70. PMID: 11896054

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