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melanin |
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melaninBrown pigment that gives colour to the eyes, skin, hair, feathers, and scales of many vertebrates. In humans, melanin helps protect the skin against ultraviolet radiation from sunlight. Both genetic and environmental factors determine the amount of melanin in the skin. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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The murine Agouti gene encodes a paracrine signaling molecule that promotes follicular melanocytes to produce yellow phaeomelanin pigment instead of black eumelanin pigment. There are two different types of melanin, eumelanin with black pigments and phaeomelanin with yellow pigments. Liebler finds most convincing the test-tube experiments with eumelanin that show that it has antioxidant properties. |
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