6CX6:
reference: The Structure of an As(III) S-Adenosylmethionine Methyltransferase with 3-Coordinately Bound As(III) Depicts the First Step in Catalysis., Packianathan C, Kandavelu P, Rosen BP, Biochemistry. 2018 Jun 26. doi: 10.1021/acs.biochem.8b00457. PMID: 29894638

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