| 3C9L: reference: Alternative models for two crystal structures of bovine rhodopsin., Stenkamp RE, Acta Crystallogr D Biol Crystallogr. 2008 Aug;64(Pt 8):902-4. Epub 2008, Jul 17. PMID: 18645239 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).