Natural fiber Keratin is a structural protein located at the hard surfaces in many vertebrates. Keratin has two forms, α-keratin and β-keratin and are used by different classes of animals. The naming convention for proteins follows that for keratin, alpha keratin is helical and beta keratin is sheet like. Alpha keratin is found in mammalian hair, skin, nails, horn and quills, while beta keratin can be found in avian and reptilian species in scales, feathers, and beaks. The two different structures of keratin have dissimilar mechanical properties, as seen in their dissimilar applications. The relative alignment of the keratin fibrils has a
Nine Inch Nails Nine Inch Nails. However, Reznor typically forms a backing group of musicians to perform the songs in a live setting. This live band, also known as Nine Inch Nails, rearranges the band's studio catalog and creates a different sound than that of Reznor's studio recordings. Band members have occasionally been invited to participate in the recording process, but creative control within the studio has always been exclusively with Reznor. The Tapeworm project was created in 1995 as a Nine Inch Nails side-project between Reznor and various live-band members as a more "democratic" creative environment. The band initially included live band