1KZQ:
reference: Structure of the immunodominant surface antigen from the Toxoplasma gondii SRS superfamily., He XL, Grigg ME, Boothroyd JC, Garcia KC, Nat Struct Biol 2002 Aug;9(8):606-11. PMID: 12091874

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