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Agouti works with extension to regulate the color of melanin which is produced in hairs. The agouti protein causes red to yellow pheomelanin to be produced, while the competing molecule α-MSH signals production of brown to black eumelanin. In wildtype mice, alternating cycles of agouti and α-MSH production cause agouti coloration.
Blond ( MASC) or blonde ( FEM ), also referred to as fair hair, is a human hair color characterized by low levels of eumelanin, the dark pigment. The resultant visible hue depends on various factors, but always has some yellowish color. The color can be from the very pale blond (caused by a patchy, scarce distribution of pigment) to reddish ...
A variety of human hair colors; from top left, clockwise: black, brown, blonde, white, red. Human hair color is the pigmentation of human hair follicles and shafts due to two types of melanin: eumelanin and pheomelanin. Generally, the more melanin present, the darker the hair. Its tone depends on the ratio of black or brown eumelanin to yellow ...
Jaundice, also known as icterus, is a yellowish or greenish pigmentation of the skin and sclera due to high bilirubin levels. [ 3][ 6] Jaundice in adults is typically a sign indicating the presence of underlying diseases involving abnormal heme metabolism, liver dysfunction, or biliary-tract obstruction. [ 7]
Heterochromia iridum. Heterochromia is a variation in coloration most often used to describe color differences of the iris, but can also be applied to color variation of hair [ 1] or skin. Heterochromia is determined by the production, delivery, and concentration of melanin (a pigment ). It may be inherited, or caused by genetic mosaicism ...
Oculocutaneous albinism is a form of albinism involving the eyes ( oculo- ), the skin ( - cutaneous ), and the hair. [ 1] Overall, an estimated 1 in 20,000 people worldwide are born with oculocutaneous albinism. [ 1] OCA is caused by mutations in several genes that control the synthesis of melanin within the melanocytes. [ 2]
Infected hairs usually fluoresce greenish-yellow under a Wood's lamp (blacklight). Associated with Microsporum canis , Microsporum gypseum , Trichophyton equinum , and Trichophyton verrucosum . Endothrix: Similar to ectothrix, but characterized by arthroconidia restricted to the hair shaft, and restricted to anthropophilic bacteria.
Yellow nails Certainly don't look pretty, and what causes that color is even grosser. Nails with a yellow-ish tone, could be a characteristic of a fungal infection that generally grows within the ...
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