3GIC:
reference: Stabilization of the E* form turns thrombin into an anticoagulant., Bah A, Carrell CJ, Chen Z, Gandhi PS, Di Cera E, J Biol Chem. 2009 Jul 24;284(30):20034-40. Epub 2009 May 27. PMID: 19473969

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