5O7H:
reference: Structural Variation of Type I-F CRISPR RNA Guided DNA Surveillance., Pausch P, Muller-Esparza H, Gleditzsch D, Altegoer F, Randau L, Bange G, Mol Cell. 2017 Aug 2. pii: S1097-2765(17)30494-X. doi:, 10.1016/j.molcel.2017.06.036. PMID: 28781236

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