2M3X:
reference: Optimized measurement temperature gives access to the solution structure of a 49 kDa homohexameric beta-propeller., Varnay I, Truffault V, Djuranovic S, Ursinus A, Coles M, Kessler H, J Am Chem Soc. 2010 Nov 10;132(44):15692-8. doi: 10.1021/ja1064608. PMID: 20961124

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