Protein or the physical region of the protein that participates in chemical catalysis. In solution proteins also undergo variation in structure through thermal vibration and the collision with other molecules. Proteins can be informally divided into three main classes, which correlate with typical tertiary structures: globular proteins, fibrous proteins, and membrane proteins. Almost all globular proteins are soluble and many are enzymes. Fibrous proteins are often structural, such as collagen, the major component of connective tissue, or keratin, the protein component of hair and nails. Membrane proteins often serve as receptors or provide channels for polar or charged molecules to pass
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