| 1ZS8: reference: Structure of a pheromone receptor-associated MHC molecule with an open and empty groove., Olson R, Huey-Tubman KE, Dulac C, Bjorkman PJ, PLoS Biol. 2005 Aug;3(8):e257. Epub 2005 Jul 12. PMID: 16089503 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).