3VED:
reference: Distal heme pocket residues of B-type dye-decolorizing peroxidase: arginine but not aspartate is essential for peroxidase activity., Singh R, Grigg JC, Armstrong Z, Murphy ME, Eltis LD, J Biol Chem. 2012 Mar 23;287(13):10623-30. Epub 2012 Feb 3. PMID: 22308037

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