| DHI | 5,6-dihydroxyindole |
| DHICA | 5,6-dihydroxyindole-2-carboxylic acid |
| EGF | Epidermal Growth Factor |
| IQCA | 5,6-dihydroxyindole-2-carboxylic acid |
| MeA | Metal ion binding site A |
| MeB | Metal ion binding site B |
| OCA | Oculocutaneous albinism |
| Trp | Tyrosinase-related protein |