Biopigment, present in the skin and hair of humans.

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Why can dogs not have a pink(ish) coat color?

In yellow dogs, there is a mutation in the MC1R gene which leads to a nonfunctional receptor. This leads to the production of pheomelanin which is pink/red (depending on concentration) instead of ...
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How to increase pheomelanin production?

How can you increase the pheomelanin production in your body, while decreasing the eumelanin production? In other words, shifting the balance towards pheomelanin. From what I see, sulfur and cysteine ...
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Why is hyper pigmentation the common aftermath of skin lesions and abrasions?

I'm aware that melanocytes produce melanin, giving color to the skin, but why are these cells recruited or overactive when healing skin abrasions, lesions and sores when T-cells and inflammatory ...
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How long does a tan last?

How long do melanocytes and melanosomes continue to protect DNA after UV exposure? Basically, if skin is tanned, then over the next month it is shed, will melanocytes continue to produce high levels ...
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Why Do Most Humans & Cats Have Blue/Bluish Eyes At Birth?

I've read that the eye color at birth for most humans and for cats may not always be the the true genetic color at first. This is due to the lack of melanin in the iris. This makes sense as there is ...