| The superoxide anion radical is capable of causing as much cellular damage as singlet oxygen. |
| Xanthine oxidase catalyses the oxidation of xanthine and hypoxanthine to uric acid and is a well-known producer of superoxide radicals. |
| Xanthine oxidase, a flavoprotein, catalyses the oxidation of hypoxanthine to xanthine and then generated superoxide and uric acid. |
| Xanthine oxidase uses molecular oxygen as an electron acceptor, resulting in the formation of superoxide radicals. |
| Subsequent oxidation-reduction reactions can also produce superoxide anions, hydrogen peroxide and hydroxyl radicals. |
| These included transcripts for an ascorbate peroxidase and two superoxide dismutases. |
