以头发为例，头发的颜色是由3种色素决定的：黑真色素（black eumelanin） 、褐真色素（brown eumelanin）、假黑色素（pheomelanin）。
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The subtype pheomelanin is responsible for red hair, while the subtype eumelanin is responsible for grey, black, yellow, and brown hair.
黑素子类别中的褐黑素的多少会决定头发红色的程度，而另一类真黑素则会决定头发灰、黑、黄和棕色的程度。
By using the technology of IR spectrum, the result showed that the basic structure of melanin of Black Bone Sheep is similar to silky fowl, and the mainly composition is eumelanin.
IR光谱研究结果表明，乌骨绵羊黑色素的基本结构与乌骨鸡基本一致，主要是真黑色素。
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