3JCH:
reference: Cryo-EM Structures of the Magnesium Channel CorA Reveal Symmetry Break upon Gating., Matthies D, Dalmas O, Borgnia MJ, Dominik PK, Merk A, Rao P, Reddy BG, Islam S, Bartesaghi A, Perozo E, Subramaniam S, Cell. 2016 Feb 11;164(4):747-56. doi: 10.1016/j.cell.2015.12.055. PMID: 26871634

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).