A500	Absorbance at the wavelength of 500 nm
A650	Absorbance at the wavelength of 650 nm
4-AHP	4-Amino-3-hydroxyphenylalanine
AHPO	Alkaline hydrogen peroxide oxidation
ANCOVA	Analysis of covariance
ANOVA	Analysis of variance
DHI	5,6-Dihydroxyindole
DHICA	5,6-Dihydroxyindole-2-carboxylic acid
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
SEM	Scanning electron microscope
TDCA	Thiazole-4,5-dicarboxylic acid
TM	Total melanin amount
TTCA	Thiazole-2,4,5-tricarboxylic acid