2WBF:
reference: Structural insights into the protease-like antigen Plasmodium falciparum SERA5 and its noncanonical active-site serine., Hodder AN, Malby RL, Clarke OB, Fairlie WD, Colman PM, Crabb BS, Smith BJ, J Mol Biol. 2009 Sep 11;392(1):154-65. Epub 2009 Jul 8. PMID: 19591843

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