Keratin Keratin Keratin () is one of a family of fibrous structural proteins. It is the key structural material making up hair, horns, claws, hooves, and the outer layer of human skin. Keratin is also the protein that protects epithelial cells from damage or stress. Keratin is extremely insoluble in water and organic solvents. Keratin monomers assemble into bundles to form intermediate filaments, which are tough and form strong unmineralized epidermal appendages found in reptiles, birds, amphibians, and mammals. The only other biological matter known to approximate the toughness of keratinized tissue is chitin. Keratin derives from Greek ' from '
The Name of This Band Is Talking Heads vinyl edition – this track has been included on the subsequent CD release. The title of the album is a reference both to the group's preference for having no expressed definite article within the band name (as opposed to "The Talking Heads") and to David Byrne's minimalist introductions to songs. The album opens with one such introduction: "The name of this song is "New Feeling". That's what it's about." An expanded version of the record, on CD in the United States for the first time, was released in 2004 by Sire/Warner Bros./Rhino. It duplicated the pattern of the original with