Skin pigmentation

Does UV level increase the rate of pigmentation in skin? ( Stimulation of melanocytes...) Or if the UV level is high enough, ie 4 and above, is pigmentation ...

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... mutually exclusive: mammals may have lost their ability to create green pigmentations as a result of it not being an advantegeous trait for them. ... shortly) is probably more a consequence of the nature of mammalian skin and body hair than anything else, which apparently doesn't lend itself ...

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... and the question was regarding bacterial pigments, not pigments in skin. Some bacteria do produce pigments of photosynthesis but these microbes ... offered, Kocuria rhizophilia (formerly Micrococcus luteus) yellow pigmentation is due to carotenoids the function of which here is not real ...

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... the answer is simply that mammals lack the ability to produce green pigmentation in their fur or hide, or indeed any great range of pigmentation, ... chestnut, but there are no primary colours in mammal hair. Strangely, skin can produce primaries, especially in monkeys but it is used for sex ...

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... could nefariously turn a white man (literally) black, in terms of his pigmentation? I'm thinking either something to do with Iodine, a virus or ... bacteria, or perhaps even DNA of a Gorilla (which, of course, has black skin). The desired end result of this plot device is that the character would ...

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