it was concluded that ( a ) visual differentiation of hair color does not always reflect the melanogenesis type in human red hair , ( b ) chemical analysis of melanogenesis type corresponds well to the fine structural differentiation of eumelanosomes and pheomelanosomes , and ( c ) human pheomelanosomes are spherical granules with microvesicular ( vesiculoglobular ) and proteinaceous matrices on which melanin deposition is spotty and granular .
C1513094
melanogenesis
C0025196
melanin