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1·In fact, it's keratin which makes them flexible and without it they would be very rigid.

实际上，是角蛋白使它们变得富有弹性，并且没有角蛋白的话，它们会变得非常坚硬。

2·Now hair, whatever it is for and wherever it is on the human body, is composed mainly of a protein called keratin.

不管毛发是用来做什么的，也不管它在人体的哪个部位，它都主要由一种叫做角蛋白的蛋白质组成。

3·The alpha helix is found in muscle protein and keratin.

α螺旋存在于肌肉蛋白和角蛋白中。

4·Keratin is the major protein in hair and nails.

角蛋白是毛发和指甲中的主要蛋白质。

5·The main component of hair is known as keratin .

头发的主要成分被称为角蛋白。

6·Our hair is made of a type of protein called keratin.

我们的头发是由一种称为角蛋白的蛋白质。

7·The sulfurous smell of Burning keratin is distinctive.

可从燃烧时的硫磺味识别出角蛋白。

8·Keratin is a tough, fibrous protein found in hair and nails.

角质是一种硬纤维蛋白，在头发和指甲中都存在。

9·The process renders the keratin useless when applied topically.

这个过程使角无用的局部应用时。

10·They lack of a protective keratin layer and therefore burn easily.

它缺乏一种保护的角朊层，因此容易晒裂。