Dimethyl sulfoxide rather than superoxide is the reactive species in horseradish peroxidase--KO2/dimethyl sulfoxide system.
It has been shown that dimethyl sulfoxide competes with the enzyme substrate towards horseradish peroxidase compound I, but probably not towards horseradish peroxidase compound II. Dimethyl sulfoxide may hinder the reaction of superoxide with horseradish peroxidase compound II by modifying heme center. In this connection dimethyl sulfoxide is not recommended as a solvent in catalytic studies of horseradish peroxidase.
Gebicka
L
L
Institute of Applied Radiation Chemistry, Technical University of Lódź, Poland.
Gebicki
J L
JL
D004121:Dimethyl Sulfoxide / Q000737:chemistry*; D006735:Horseradish Peroxidase / Q000737:chemistry*; D017382:Reactive Oxygen Species / Q000737:chemistry*; D013481:Superoxides / Q000737:chemistry*
D017382:Reactive Oxygen Species; D013481:Superoxides; D006735:Horseradish Peroxidase; D004121:Dimethyl Sulfoxide