pheomelanin

pheomelanin
A brown pigment produced by melanocytes

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  • pheomelanin — A type of melanin found in red hair; it contains sulfur and is alkali soluble; elevated levels are found in the rufous type of oculocutaneous albinism. Cf.:eumelanin. [G. phaios, dusky, + melos (melan ), black] * * * pheo·mel·a·nin (fe″o… …   Medical dictionary

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  • Melanocyte — A pigment producing cell in the skin, hair and eye that determines their color. The pigment that melanocytes make is called melanin. The major determinant of color is not the number but rather the activity of the melanocytes. Melanin production… …   Medical dictionary

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  • Human hair color — Hair color is the pigmentation of hair follicles due to the two types of melanin, eumelanin and phaeomelanin. Generally, if more melanin is present in the hair, the color of the hair is darker; if less melanin is present, the hair color is… …   Wikipedia

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  • Optical window in biological tissue — The Optical window [1] (also known as therapeutic window) defines the range of wavelengths where light has its maximum depth of penetration in tissue. Within the NIR window, scattering is the most dominant light tissue interaction, and therefore… …   Wikipedia

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