| 2ZHY: reference: Crystal structure of a PduO-type ATP:cobalamin adenosyltransferase from Burkholderia thailandensis., Moon JH, Park AK, Jang EH, Kim HS, Chi YM, Proteins. 2008 Aug 15;72(3):1066-70. PMID: 18473361 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).