| 1SOG: reference: Electrostatic control of the tryptophan radical in cytochrome c peroxidase., Barrows TP, Bhaskar B, Poulos TL, Biochemistry. 2004 Jul 13;43(27):8826-34. PMID: 15236591 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).