| ROS | Reactive oxygen species |
| O2•− | Superoxide |
| XOR | Xanthine oxidoreductase |
| NADPH | Nicotinamide adenine dinucleotide phosphate |
| NOX | NADPH oxidase |
| NO | Nitric oxide |
| SOD | Superoxide dismutase |
| Sod1 −/− | Sod1-deficient |
| XO | Xanthin oxidase |
| XDH | Xanthin dehydrogenase |
| KI | Knock-in |
| WT | Wild type |