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
What Is the Fastest Thing in the World? What Is the Fastest Thing in the World? What Is the Fastest Thing in the World? is a Greek fairy tale collected by Georgios A. Megas in "Folktales of Greece". It is Aarne-Thompson type 875 and has many Greek and Slavic variants, generally revolving about the exchange of clever answers. This type of tale is the commonest European tale dealing with witty exchanges. In ballad form, the clever answers to the riddles, and the winning of a husband by them, are found in Child ballad 1, "Riddles Wisely Expounded". A brother argue over how they should split their land, some