3JBS:
reference: Single-particle cryoEM analysis at near-atomic resolution from several thousand asymmetric subunits., Passos DO, Lyumkis D, J Struct Biol. 2015 Nov;192(2):235-44. doi: 10.1016/j.jsb.2015.10.002. Epub 2015 , Oct 22. PMID: 26470814

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