Melanin

$Melanin pigment (light refracting granular material—center of image) in a pigmented melanoma.$

Part of the structural formula of eumelanin.

Part of the structural formula of pheomelanin.

Melanin /ˈmɛlənɪn/ (Greek:μέλας - melas, "black, dark") is a broad term for a group of natural pigments found in most organisms (arachnids are one of the few groups in which it has not been detected). Melanin is produced by the oxidation of the amino acid tyrosine, followed by polymerization. The pigment is produced in a specialized group of cells known as melanocytes.

单词	Phaeomelanic
释义	Phaeomelanic 英语百科 Melanin $Melanin pigment (light refracting granular material—center of image) in a pigmented melanoma.$ Melanin /ˈmɛlənɪn/ (Greek:μέλας - melas, "black, dark") is a broad term for a group of natural pigments found in most organisms (arachnids are one of the few groups in which it has not been detected). Melanin is produced by the oxidation of the amino acid tyrosine, followed by polymerization. The pigment is produced in a specialized group of cells known as melanocytes.
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Phaeomelanic

Melanin