3EXB:
reference: Replacement of an electron transfer pathway in cytochrome c peroxidase with a surrogate peptide., Hays Putnam AM, Lee YT, Goodin DB, Biochemistry. 2009 Jan 13;48(1):1-3. PMID: 19072042

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