3ZLD:
reference: Toxoplasma gondii Sporozoites Invade Host Cells Using Two Novel Paralogues of RON2 and AMA1., Poukchanski A, Fritz HM, Tonkin ML, Treeck M, Boulanger MJ, Boothroyd JC, PLoS One. 2013 Aug 5;8(8):e70637. doi: 10.1371/journal.pone.0070637. Print 2013. PMID: 23940612

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