| 1STO: reference: Crystal structure of orotate phosphoribosyltransferase., Scapin G, Grubmeyer C, Sacchettini JC, Biochemistry 1994 Feb 15;33(6):1287-94. PMID: 8312245 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).