1JV9:
reference: A highly destabilizing mutation, G37A, of the bovine pancreatic trypsin inhibitor retains the average native conformation but greatly increases local flexibility., Battiste JL, Li R, Woodward C, Biochemistry 2002 Feb 19;41(7):2237-45. PMID: 11841215

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