| 3RVY: reference: The crystal structure of a voltage-gated sodium channel., Payandeh J, Scheuer T, Zheng N, Catterall WA, Nature. 2011 Jul 10;475(7356):353-8. doi: 10.1038/nature10238. PMID: 21743477 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).