| 3I9W: reference: Structural analysis of sensor domains from the TMAO-responsive histidine kinase receptor TorS., Moore JO, Hendrickson WA, Structure. 2009 Sep 9;17(9):1195-204. PMID: 19748340 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).