1TOC:
reference: The ornithodorin-thrombin crystal structure, a key to the TAP enigma?, van de Locht A, Stubbs MT, Bode W, Friedrich T, Bollschweiler C, Hoffken W, Huber R, EMBO J 1996 Nov 15;15(22):6011-7. PMID: 8947023

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