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noun Protein n. (Physiol. Chem.) Any polymer of an amino acid joined by peptide (amide) bonds. Most natural proteins have alpha-amino acids as the monomeric constituents. All classical enzymes are composed of protein, and control most of the biochemical transformations carrie dout in living cells. They may be soluble, as casein, albumins, and other globular proteins, or insoluble (e. g. "structural proteins"), as collagen or keratin. "albumin", an older term for protein, is now used primarily to refer to certain specific soluble globular proteins found in eggs or blood serum, e.g. bovine serum albumin, the main soluble protein in teh serum of cattle, used as an enzymatically inert protein in biochemical research. Note: In the 1913 dictionary, protein was defined as: "A body now known as alkali albumin, but originally considered to be the basis of all albuminous substances, whence its name." Protein crystal. (Bot.) See Crystalloid, n., 2.
Collaborative International Dictionary of English 0.48
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"Protein" Quotes from Famous Books
 ... a low percentage of water, with varying proportions of mineral matter and fat. In addition to the four food-stuffs already studied, cereals contain a small amount of another food-stuff known as protein—a muscle-building material. For the most part, the cereals contain a large amount of cellulose, which is broken up during the process of preparation for market and requires long cooking before being ready for use by the body. The digestibility of the cereals depends upon the amount of cellulose ...
— Ontario Teachers' Manuals: Household Science in Rural Schools • Ministry of Education Ontario
... The quantities of protein are small. Roughly speaking, the food of these negroes furnished one-third to three-fourths as much protein as are called for in the current physiological standards and as are actually found in the dietaries ...
— The Negro Farmer • Carl Kelsey
... fun," chided Billy; "and when it's really serious, too. Now listen," she admonished, picking up the book again. "'If a man consumes a large amount of meat, and very few vegetables, his diet will be too rich in protein, and too lacking in carbohydrates. On the other hand, if he consumes great quantities of pastry, bread, butter, and tea, his meals will furnish too much energy, and not enough building material.' ...
— Miss Billy Married • Eleanor H. Porter
... animals, as the clergyman set it forth to them, was to convert plant-tissue into a more concentrated and perfect form of nutriment. "The protein of animal flesh," he was saying, "is more nearly allied to human tissue; and so it is clearly more ...
— Love's Pilgrimage • Upton Sinclair |
Words linked to "Protein" : macromolecule, protein molecule, high-protein diet, compound protein, phosphoprotein, capsid, amino acid, prostate specific antigen, conjugated protein, amyloid, haptoglobin, amyloid protein plaque, antibody, actomyosin, polypeptide, aleurone, opsin, proteinaceous, filaggrin, iodoprotein, legume, silver protein, protein folding, PSA, gluten, cytokine, simple protein, egg, proteome, C-reactive protein, plasma protein, aminoalkanoic acid, growth factor, meat, apoenzyme, iodinated protein, ferritin, eggs |
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