![]() Eumelanin is an effective absorbent of light the pigment is able to dissipate over 99.9% of absorbed UV radiation. In the human skin, melanogenesis is initiated by exposure to UV radiation, causing the skin to darken. Allomelanin and pyomelanin are two types of nitrogen-free melanin. Research has been undertaken to investigate its efficacy in treating neurodegenerative disorders such as Parkinson's. Pheomelanin, which is produced when melanocytes are malfunctioning due to derivation of the gene to its recessive format is a cysteine-derivative that contains poly benzothiazine portions that are largely responsible for the red or yellow tint given to some skin or hair colors. Eumelanin is produced through a multistage chemical process known as melanogenesis, where the oxidation of the amino acid tyrosine is followed by polymerization. The most common type is eumelanin, of which there are two types - brown eumelanin and black eumelanin. There are five basic types of melanin: eumelanin, pheomelanin, neuromelanin, allomelanin and pyomelanin. The melanin pigments are produced in a specialized group of cells known as melanocytes. ![]() Melanin ( / ˈ m ɛ l ə n ɪ n/ ( listen) from Ancient Greek μέλας ( mélas) 'black, dark') is a broad term for a group of natural pigments found in most organisms. ![]() Micrograph of the epidermis, with melanin labeled at left. Micrograph of Melanin pigment (light refracting granular material-center of image) in a pigmented melanoma.
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