Alpha-keratin Alpha-keratin Alpha-keratin, or α-keratin, is a type of keratin found in mammals. This protein is the primary component in hairs, horns, nails and the epidermis layer of the skin. α-keratin is a fibrous structural protein, meaning it is made up of amino acids that form a repeating secondary structure. The secondary structure of α-keratin is very similar to that of a traditional protein α-helix and forms a coiled coil. Due to its tightly wound structure, it can function as one of the strongest biological materials and has various uses in mammals, from predatory claws to hair for warmth. α-keratin is
Hair (Lady Gaga song) about having a good time." Matthew Perpetua from "Rolling Stone" called it a mixture of yearning romantic melodrama of "We Belong" with the hard industrial metal edge of Broken-era Nine Inch Nails. Greg Kot of the "Chicago Tribune" felt that Gaga's vocals are Auto-Tuned throughout the song. The lyrics of "Hair" talk about embracing one's hairstyle as the ultimate expression of their identity, hence it ends with Gaga triumphantly declaring "I am my hair!" at the end of the final chorus. "Hair" has received mostly positive reviews. An hour before starting the final leg of The Monster Ball Tour, Gaga