| Xanthine oxidase uses molecular oxygen as an electron acceptor, resulting in the formation of superoxide radicals. |
| Paraquat acts as an alternative electron acceptor from PSI generating superoxide. |
| The administration of superoxide dismutase to scavenge superoxide anions was found to promote the survival rate of transplanted skin flaps. |
| Xanthine oxidase catalyses the oxidation of xanthine and hypoxanthine to uric acid and is a well-known producer of superoxide radicals. |
| It is formed from the reaction of nitric oxide with superoxide, and produces carbonyls on proteins. |
| Also, nitric oxide synthase will produce superoxide in lieu of nitric oxide when arginine concentration is low. |
