6PTI:
reference: Structure of form III crystals of bovine pancreatic trypsin inhibitor., Wlodawer A, Nachman J, Gilliland GL, Gallagher W, Woodward C, J Mol Biol 1987 Dec 5;198(3):469-80. PMID: 2448484

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