| A500 | Absorbance at the wave length of 500 nm |
| A650 | Absorbance at the wave length of 650 nm |
| 4-AHP | 4-Amino-3-hydroxyphenylalanine |
| DHI | 5,6-Dihydroxyindole |
| DHICA | 5,6-Dihydroxyindole-2-carboxylic acid |
| H2O2 | Hydrogen peroxide |
| HPLC | High performance liquid chromatography |
| PDCA | Pyrrole-2,3-dicarboxylic acid |
| PTCA | Pyrrole-2,3,5-tricarboxylic acid |
| PTeCA | Pyrrole-2,3,4,5-tetracarboxylic acid |
| TDCA | Thiazole-4,5-dicarboxylic acid |
| TM | Total melanin amount |
| TTCA | Thiazole-2,4,5-tricarboxylic acid |
| UV | Ultraviolet |