Chemistry, asked by swapanjit9186, 11 months ago

Melanin coagulates with step of biochemical reaction

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Answered by saurabh1578
0
Melanin (/ˈmɛlənɪn/ (listen); from Greek:μέλας melas, "black, dark") is a broad term for a group of natural pigments found in mostorganisms. Melanin is produced through a multistage chemical process known asmelanogenesis, where the oxidation of theamino acid tyrosine, is followed bypolymerization. The melanin pigments are produced in a specialized group of cells known as melanocytes.

MelaninIdentifiers

CAS Number

8049-97-6

ChemSpider

4884931 

PubChem CID

6325610

Properties

Chemical formula

C18H10N2O4Molar mass318.288 g·mol−1Density1.6 to 1.8 g/cm3Melting point< −20 °C (−4 °F; 253 K)Boiling point450 to 550 °C (842 to 1,022 °F; 723 to 823 K)

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Infobox references

Not to be confused with melamine or melatonin.



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

There are three basic types of melanin:eumelanin, pheomelanin, and neuromelanin. The most common type is eumelanin, of which there are two types—brown eumelanin and black eumelanin. Pheomelanin is acysteine-derivative that contains polybenzothiazine portions that are largely responsible for the color of red hair, among other pigmentation. Neuromelanin is found in the brain. Research has been undertaken to investigate its efficacy in treating neurodegenerative disorders such as Parkinson's. [1]

In the human skin, melanogenesis is initiated by exposure to UV radiation, causing the skin to darken. Melanin is an effective absorbent of light; the pigment is able to dissipate over 99.9% of absorbed UV radiation.[2] Because of this property, melanin is thought to protect skin cells from UVB radiation damage, 

Answered by Anonymous
0

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