3RTK:
reference: The dimeric structure of the Cpn60.2 chaperonin of Mycobacterium tuberculosis at 2.8 A reveals possible modes of function., Shahar A, Melamed-Frank M, Kashi Y, Shimon L, Adir N, J Mol Biol. 2011 Sep 16;412(2):192-203. Epub 2011 Jul 23. PMID: 21802426

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