1EUP:
reference: Crystal structures of ligand complexes of P450eryF exhibiting homotropic cooperativity., Cupp-Vickery J, Anderson R, Hatziris Z, Proc Natl Acad Sci U S A. 2000 Mar 28;97(7):3050-5. PMID: 10716705

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