Table III.

Nonenzymatic reactions involving superoxide radicals, hydrogen peroxide, and antioxidants and their apparent bimolecular rate constants

Reactionk (M−1 s−1)Reference
2O Embedded Image + 2H+→H2O2 +O2 4 × 105, pH 7 Asada and Takahashi (1987)
O Embedded Image + ASC + H+→MDA + H2O2 2 × 105 Asada and Takahashi (1987)
O Embedded Image + GSH +H+→GS· + H2O2 7 × 105 Asada and Takahashi (1987)
MDA + MDA→DHA +ASC3 × 105, pH 7 Asada and Takahashi (1987)
H2O2 + 2ASC→2MDA +2H2O2 Polle and Junkermann (1996)
DHA +2GSH→GSSG + ASC1 × 105 Hausladen and Kunert (1990)