4X8D:
reference: Structure of the Sulfoxide Synthase EgtB from the Ergothioneine Biosynthetic Pathway., Goncharenko KV, Vit A, Blankenfeldt W, Seebeck FP, Angew Chem Int Ed Engl. 2015 Jan 16. doi: 10.1002/anie.201410045. PMID: 25597398

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