3ISY:
reference: The first structure in a family of peptidase inhibitors reveals an unusual Ig-like fold., Rigden DJ, Xu Q, Chang Y, Eberhardt RY, Finn RD, Rawlings ND, F1000Res. 2013 Jul 10;2:154. doi: 10.12688/f1000research.2-154.v2. eCollection, 2013. PMID: 24555072

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