| 3DHS: reference: Mapping metal-binding sites in the catalytic domain of bacterial RNase P RNA., Kazantsev AV, Krivenko AA, Pace NR, RNA. 2009 Feb;15(2):266-76. Epub 2008 Dec 17. PMID: 19095619 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).