| 3VA7: reference: Crystal structure of urea carboxylase provides insights into the carboxyltransfer reaction., Fan C, Chou CY, Tong L, Xiang S, J Biol Chem. 2012 Mar 16;287(12):9389-98. Epub 2012 Jan 25. PMID: 22277658 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).