| 1KRJ: reference: Conversion of an engineered potassium-binding site into a calcium-selective site in cytochrome c peroxidase., Bonagura CA, Bhaskar B, Sundaramoorthy M, Poulos TL, J Biol Chem 1999 Dec 31;274(53):37827-33. PMID: 10608846 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).