5O4J:
reference: A Water-Bridged H-Bonding Network Contributes to the Catalysis of the SAM-Dependent C-Methyltransferase HcgC., Bai L, Wagner T, Xu T, Hu X, Ermler U, Shima S, Angew Chem Int Ed Engl. 2017 Jul 6. doi: 10.1002/anie.201705605. PMID: 28682478

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