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
In the Skin of a Lion "It is a novel about the wearing and the removal of masks; the shedding of skin, the transformations and translations of identity." An important aspect of the novel is its depiction of Toronto in the 1930s. Ondaatje spent many months in the archives of the City of Toronto and newspapers of the era. Prominence is given to the construction of two Toronto landmarks, the Prince Edward Viaduct, commonly known as the Bloor Street Viaduct, and the R. C. Harris Water Treatment Plant, and focuses on the lives of the immigrant workers. The plot incorporates a number of true stories of