6MUR:
reference: Type III-A CRISPR-Cas Csm Complexes: Assembly, Periodic RNA Cleavage, DNase Activity Regulation, and Autoimmunity., Jia N, Mo CY, Wang C, Eng ET, Marraffini LA, Patel DJ, Mol Cell. 2018 Nov 27. pii: S1097-2765(18)30977-8. doi:, 10.1016/j.molcel.2018.11.007. PMID: 30503773

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