Fibrous proteins Fibrous proteins tend to be long, narrow molecules. Fibrous proteins are used to construct macroscopic structures, especially structures outside of cells. Fibrous proteins tend to have a structural role, although some have more active functions as well. Examples: The protein α-keratin is used to form hair, nails, and skin. α-Keratin is a coiledcoil of α-helices ~300 residues lo...
