| 1XK0: reference: Crystal structures of the G139A, G139A-NO and G143H mutants of human heme oxygenase-1. A finely tuned hydrogen-bonding network controls oxygenase versus peroxidase activity., Lad L, Koshkin A, de Montellano PR, Poulos TL, J Biol Inorg Chem 2005 Mar;10(2):138-46. Epub 2005 Feb 3. PMID: 15690204 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).