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
Nissan Nails features an upwards opening tailgate. On the interior, the Nails features "integrated communications" tools, such as cellular phone integration. Nissan Nails The Nissan Nails is a concept pickup truck built by Nissan. It was introduced in 2001 at the Tokyo Auto Show. The Nails is powered by a front-mounted 1.5 L Inline-four engine producing around , with power going to the front wheels. It features a 2-door, 2-seater pickup body style with body panels that Nissan claims are manufactured to be dent and scratch resistant. The load bed of the Nails is placed beneath the wheels, unlike many contemporary pickup