Table III.
Nonenzymatic reactions involving superoxide radicals, hydrogen peroxide, and antioxidants and their apparent bimolecular rate constants
| Reaction | k (M−1 s−1) | Reference |
|---|---|---|
2O −+ 2H+→H2O2+ O2
|
4 × 105, pH 7 | Asada and Takahashi (1987) |
O −+ ASC + H+→MDA + H2O2
|
2 × 105 | Asada and Takahashi (1987) |
O −+ GSH + H+→GS·+ H2O2
|
7 × 105 | Asada and Takahashi (1987) |
| MDA + MDA→DHA + ASC | 3 × 105, pH 7 | Asada and Takahashi (1987) |
| H2O2+ 2ASC→2MDA + 2H2O | 2 | Polle and Junkermann (1996) |
| DHA + 2GSH→GSSG + ASC | 1 × 105 | Hausladen and Kunert (1990) |