5M1S:
reference: Self-correcting mismatches during high-fidelity DNA replication., Fernandez-Leiro R, Conrad J, Yang JC, Freund SM, Scheres SH, Lamers MH, Nat Struct Mol Biol. 2017 Jan 9. doi: 10.1038/nsmb.3348. PMID: 28067916

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