Silk fibroins belong to this family of proteins, which, along with elastin and collagen, provides elasticity to the skin.
In desmosomes, desmoplakin bind to one type of this protein on the intracellular face, and a condition commonly known as "chicken skin" occurs when this protein builds up in pores. This protein contains high proportions of glycine and alanine for tight bonding of the coiled coil it normally appears in, which contains several disulfide bonds for stability. Silk fibroins belong to this family of proteins, which, along with elastin and collagen, provides elasticity to the skin. For 10 points, name this common, filamentous structural protein found in feathers, claws, fur, and especially skin, hair, and nails.
In desmosomes, desmoplakin bind to one type of this protein on the intracellular face, and a condition commonly known as "chicken skin" occurs when this protein builds up in pores.
{keratin}