2BYU:
reference: Dodecameric structure of the small heat shock protein Acr1 from Mycobacterium tuberculosis., Kennaway CK, Benesch JL, Gohlke U, Wang L, Robinson CV, Orlova EV, Saibil HR, Keep NH, J Biol Chem. 2005 Sep 30;280(39):33419-25. Epub 2005 Jul 26. PMID: 16046399

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