3AJX:
reference: Crystal structure of 3-hexulose-6-phosphate synthase, a member of the orotidine 5'-monophosphate decarboxylase suprafamily., Orita I, Kita A, Yurimoto H, Kato N, Sakai Y, Miki K, Proteins. 2010 Aug 25. PMID: 20938979

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