4BDV:
reference: Evaluation of the metal binding sites in a recombinant coagulation factor VIII identifies two sites with unique metal binding properties., Svensson LA, Thim L, Olsen OH, Nicolaisen EM, Biol Chem. 2013 Jun 1;394(6):761-5. doi: 10.1515/hsz-2012-0298. PMID: 23435097

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