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What is the function of keratin in the skin?

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Quick Answer

A protein found in skin, nails, hair and teeth, keratin is responsible for the skin's structural integrity. It also forms a protective barrier on the outer layer of the skin, according to Teens Health. Keratin can be hard, as in the case of fingernails, or soft like skin, says Wikipedia.

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What is the function of keratin in the skin?
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Full Answer

Made up of tough, insoluble filaments, keratin is extremely difficult to dissolve and requires a chemical reaction to do so, according to Wikipedia. Keratin is produced by cells called keratinocytes and contains amino acids, a specialized type of protein, according to Teens Health. Keratin can also be found in animal hooves and horns.

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