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 Castle of My Skin In the Castle of My Skin In the Castle of My Skin is the first and much acclaimed novel by Barbadian writer George Lamming, originally published in 1953 by Michael Joseph in London, and subsequently published in New York City by McGraw-Hill. The novel won a Somerset Maugham Award and was championed by eminent figures Jean-Paul Sartre and Richard Wright, the latter writing an introduction to the book's US edition. An autobiographical novel, set in the 1930s–'40s in Carrington Village, Barbados, where the author was born and raised, "In the Castle of My Skin" follows the events in a young