1XBV:
reference: Evolution of enzymatic activities in the orotidine 5'-monophosphate decarboxylase suprafamily: structural basis for catalytic promiscuity in wild-type and designed mutants of 3-keto-L-gulonate 6-phosphate decarboxylase., Wise EL, Yew WS, Akana J, Gerlt JA, Rayment I, Biochemistry 2005 Feb 15;44(6):1816-23. PMID: 15697207

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