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Category:	Science
Word Count:	406
Featured Papers from Direct Essays 1. integument system 2. blue whales 3. Blue Whales 4. Proteins 5. Blue whales

	Keratin
	Keratin is an extremely strong protein which is a major component in skin, hair, nails, hooves, horns, and teeth. The amino acids which combine to form keratin have several unique properties, and depending on the levels of the various amino acids, keratin can be inflexible and hard, like hooves, or soft, as is the case with skin. Most of the keratin that people interact with is actually dead; hair, skin, and nails are all formed from dead cells which the body sheds as new cells push up from unde

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Keratin