Chemical constituents include keratin and eukeratin as well as other proteins, peptides and free amino acids.
Cells are laced with a network of fibres more rigid than the rope-like structural proteins collagen and keratin .
The structures had probably been covered with keratin , the same protein found in fingernails, horns, and claws.
Amino acids are absorbed by the body to help build keratin , the main protein in hair.
They are unable to grow in living tissues but instead can multiply in structures containing keratin .
Animal hair fibers consist of a protein known as keratin .
The slightly flattened spikes were covered with keratin , the same protein found in horns, fingernails, and claws.
Androgens are also responsible for the increased growth in body hair and an increased shedding of keratin , a protein that can block pores and the flow of sebum.
Your fingernails are composed of layers of keratin , a protein also found in hair and skin.
The mature nail is a plate of the protein keratin which is also present in hair and skin.