6I1K:
reference: Mechanistic Insights into the cis- and trans-Acting DNase Activities of Cas12a., Swarts DC, Jinek M, Mol Cell. 2019 Feb 7;73(3):589-600.e4. doi: 10.1016/j.molcel.2018.11.021. Epub, 2019 Jan 10. PMID: 30639240

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