Fibril and hence the whole muscle. Elastin is a fibrous protein common in various soft tissues, like skin, blood vessels and lung tissue. Each monomer connects with each other, forming a 3D network, with ability to endure over 200% strain before deformation. Keratin is a structural protein mainly found in hair, nails, hooves, horns, quills. Basically keratin is formed by polypeptide chains, which coil into α-helices with sulfur cross-links or bond into β-sheets linked by hydrogen bonding. β-keratin, which is tougher than α-conformation, is more common in birds and reptiles. Resilin is an elastomeric insect protein, consisting of both α-helices and
Afro-textured hair (especially Black women) "had many Eurocentric features, including hairstyles." However, during the movement, the Black community endeavoured to define their own ideals and beauty standards, and hair became a central icon which was "promoted as a way of challenging mainstream standards regarding hair." At this time, an African-American person's "ability to conform to mainstream standards of beauty [was] tied to being successful." Thus, rejecting straightened hair symbolized a deeper act of rejecting the belief that straightening hair and other forms of grooming which were deemed 'socially acceptable' were the only means of looking presentable and attaining success in society. The