1THR:
reference: Structures of thrombin complexes with a designed and a natural exosite peptide inhibitor., Qiu X, Yin M, Padmanabhan KP, Krstenansky JL, Tulinsky A, J Biol Chem 1993 Sep 25;268(27):20318-26. PMID: 8376390

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