4WHS:
reference: Crystal structures of alkylperoxo and anhydride intermediates in an intradiol ring-cleaving dioxygenase., Knoot CJ, Purpero VM, Lipscomb JD, Proc Natl Acad Sci U S A. 2014 Dec 29. pii: 201419118. PMID: 25548185

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