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 '
Black Is the Color of My True Love's Hair (EP) Black Is the Color of My True Love's Hair (EP) Black Is the Color of My True Love's Hair is the title of a 2003 EP by the American rock band The Twilight Singers. The song "Black Is the Colour (Of My True Love's Hair)" is a traditional folk song which was first known in the United States about 1915. However, it may have come from Scotland originally. It is about a girl who is waiting for her lover to return from sea. Greg Dulli's cover of the song would later appear on The Twilight Singers' 2004 covers album "She