最終更新日：2023/09/03
Keratins are structural proteins that make up hair, nails, and the outer layer of skin.
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Keratins are structural proteins that make up hair, nails, and the outer layer of skin.
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Keratins are structural proteins that make up hair, nails, and the outer layer of skin.
Keratins are structural proteins that make up hair, nails, and the outer layer of skin.
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