| 1UX1: reference: Structural, kinetic, and mutational studies of the zinc ion environment in tetrameric cytidine deaminase., Johansson E, Neuhard J, Willemoes M, Larsen S, Biochemistry 2004 May 25;43(20):6020-9. PMID: 15147186 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).