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
In the Shape of a Heart included two remixes. Browne is documented as saying that the song specifically addresses his relationship with his first wife, Phyllis Major, who died in March 1976 of a drug overdose: Jimmy Guterman, upon reviewing the album in 1986, singled out the song as a "mature version of the dark love songs on "The Pretender." With the lyric "I guess I never knew/What she was talking about" coupled with "I guess I never knew/What she was living without,'" Guterman writes, Browne "nails heartbreak to the wall and sends his listeners scurrying for the Kleenex." In 1989, the magazine referred to it