| UVR | Ultraviolet Radiation |
| FSK | Forskolin |
| MEFs | Mouse Embryonic Fibroblasts |
| MITF | Microphthalmia-Associated Transcription Factor |
| Tyr | Tyrosinase |
| Tyrp1 | Tyrosinase-Related Protein 1 |
| DCT | Dopachrome Tautomerase |
| l-DOPA | l-Dihydroxyphenylalanine |
| PKC | Protein kinase C |
| TPA | 12-O-Tetradecanoylphorbol 13-acetate |