Table 2.

Expression levels of melanin biosynthesis genes.

Library Gene	B16F1 melanoma cells	Melan-a2 melanocytes	E14 Stem Cell	E17.5 embryo	Descriptions
	PET counts (cpm)
Tyr	185	798	0	0	Tyrosinase precursor; Albino locus protein; Belong to tyrosinase gene family.
Dct (Tyrp2)	1468	3208	0	0	Dopachrome tautomerase precursor; Tyrosinase-related protein 2; Belong to tyrosinase gene family.
Ddt	65	58	44	0	D-dopachrome tautomerase.
Tyrp1	1750	2816	0	0	5,6-dihydroxyindole-2-carboxylic acid (DHICA) oxidase precursor; Belong to tyrosinase gene family.
Si	4751	7985	125	12	Melanocyte protein Pmel 17 precursor (Silver locus protein).