1GGF: Crystal Structure Of Catalase Hpii From Escherichia Coli, Va His128asn, Complex With Hydrogen Peroxide.
reference: Substrate flow in catalases deduced from the crystal structures of active site variants of HPII from Escherichia coli., Melik-Adamyan W, Bravo J, Carpena X, Switala J, Mate MJ, Fita I, Loewen PC, Proteins 2001 Aug 15;44(3):270-81. PMID: 11455600

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