| 2CAH: reference: Crystal structure of Proteus mirabilis PR catalase with and without bound NADPH., Gouet P, Jouve HM, Dideberg O, J Mol Biol 1995 Jun 23;249(5):933-54. PMID: 7791219 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).