Pulse radiolysis of catalase in solution. I. Reactions of O2- with catalase and its compound I.
The time-course of absorption changes of oxygen-saturated solutions of bovine-liver catalase after pulse radiolysis have been studied. The rate constant of formation of Compound I due to the reaction of catalase with hydrogen peroxide has been estimated to be 2.0 x 10(7) dm3mol-1s-1. Radiation generated superoxide radicals reduce Compound I to Compound II with a rate constant of 5.0 x 10(6) dm3mol-1s-1. The formation of Compound III in the direct reaction of O2- with catalase has also been observed.
Gebicka
L
L
Institute of Applied Radiation Chemistry, Technical University, Lódź, Poland.
Metodiewa
D
D
Gebicki
J L
JL
D000818:Animals; D002374:Catalase; D002417:Cattle; D007700:Kinetics; D011675:Pulse Radiolysis; D013057:Spectrum Analysis; D013481:Superoxides
D013481:Superoxides; D002374:Catalase