6EKO:
reference: Unique mechanism of target recognition by PfoI restriction endonuclease of the CCGG-family., Tamulaitiene G, Manakova E, Jovaisaite V, Tamulaitis G, Grazulis S, Bochtler M, Siksnys V, Nucleic Acids Res. 2019 Jan 25;47(2):997-1010. doi: 10.1093/nar/gky1137. PMID: 30445642

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