Keratin: Fibrous structural protein of hair, nails, hooves, wool, feathers, and skin.

角蛋白：毛发、指甲、蹄、羊毛、羽毛和皮肤里的纤维性结构蛋白质。

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Keratin: Fibrous structural protein of hair, nails, hooves, wool, feathers, and skin.

角蛋白：毛发、指甲、蹄、羊毛、羽毛和皮肤里的纤维性结构蛋白质。

youdao