Keratin

Keratin (high molecular weight) in bile duct cell and oval cells of horse liver

Protein sequence alignment of human Keratin 1, 2A, 3,4, 5, 6A, 7,and 8 (KRT1 - KRT8). Only the first rod domain is shown above. Alignment was created using Clustal Omega (tool available online).

Keratin (/ˈkɛrətɪn/) is one of a family of fibrous structural proteins. Keratin is the protein that protects epithelial cells from damage or stress. It is the key structural material making up the outer layer of human skin. It is also the key structural component of hair and nails, and it provides the necessary strength and toughness for masticatory organs, such as the tongue and the hard palate. Keratin monomers assemble into bundles to form intermediate filaments, which are tough and form strong unmineralized tissues found in reptiles, birds, amphibians, and mammals. The only other biological matter known to approximate the toughness of keratinized tissue is chitin.

单词	Cornified
释义	Cornified 英语百科 Keratin Keratin (/ˈkɛrətɪn/) is one of a family of fibrous structural proteins. Keratin is the protein that protects epithelial cells from damage or stress. It is the key structural material making up the outer layer of human skin. It is also the key structural component of hair and nails, and it provides the necessary strength and toughness for masticatory organs, such as the tongue and the hard palate. Keratin monomers assemble into bundles to form intermediate filaments, which are tough and form strong unmineralized tissues found in reptiles, birds, amphibians, and mammals. The only other biological matter known to approximate the toughness of keratinized tissue is chitin.
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Cornified

Keratin