melanin

n.

黑色素；

1. Freckles are caused by the sediment of melanin.
   色斑的形成是因为黑色素沉积。
2. Melanin darkens the skin and is the cause of suntan.
   黑色素使皮肤变黑是人被晒黑的原因。

Melanin Pigmentation in Mammalian Skin and Its Hormonal Regulation
Mice lacking melanin-concentrating hormone are hypophagic and lean.
A role for melanin-concentrating hormone in the central regulation of feeding behaviour.
Experimental Melanin-Induced Uveitis: Experimental Model of Human Acute Anterior Uveitis
Melanin-concentrating hormone overexpression in transgenic mice leads to obesity and insulin resistance.
Melanin-concentrating hormone 1 receptor-deficient mice are lean, hyperactive, and hyperphagic and have altered metabolism.
In Vivo Confocal Scanning Laser Microscopy of Human Skin: Melanin Provides Strong Contrast
Antidepressant, anxiolytic and anorectic effects of a melanin-concentrating hormone-1 receptor antagonist
Generalized intestinal polyposis and melanin spots of the oral mucosa, lips and digits; a syndrome of diagnostic significance
Significance of a basal melanin layer to production of non-iridescent structural plumage color: evidence from an amelanotic Steller'...