Specific activity — This article is about the specific activity of an enzyme. A completely different definition of specific activity is used in nuclear sciences and technologies, in which activity is the SI quantity related to the phenomenon of natural and… … Wikipedia
specific activity — 1. activity per unit weight of a radioactive material, or the activity of a radioisotope per unit weight of the element (including stable isotopes) present. 2. the catalytic effect of an enzyme expressed as units per milligram of enzyme … Medical dictionary
specific activity — /spəˌsɪfɪk ækˈtɪvəti/ (say spuh.sifik ak tivuhtee) noun 1. Physics the activity per unit mass of a pure radioactive isotope. 2. Physics the activity of a radioactive isotope in a material per unit mass of that material. 3. Biochemistry the… …
enzyme activity — the catalytic effect exerted by an enzyme, expressed as units per milligram of enzyme (specific activity) or as molecules of substrate transformed per minute per molecule of enzyme (molecular activity). The conventional unit of enzyme activity is … Medical dictionary
Enzyme inhibitor — Enzyme inhibitors are molecules that bind to enzymes and decrease their activity. Since blocking an enzyme s activity can kill a pathogen or correct a metabolic imbalance, many drugs are enzyme inhibitors. They are also used as herbicides and… … Wikipedia
Enzyme assay — Beckman DU640 UV/Vis spectrophotometer. Enzyme assays are laboratory methods for measuring enzymatic activity. They are vital for the study of enzyme kinetics and enzyme inhibition. Contents … Wikipedia
Enzyme — Biocatalyst redirects here. For the use of natural catalysts in organic chemistry, see Biocatalysis. Human glyoxalase I. Two zinc ions that are needed for the enzyme to catalyze its reaction are shown as purp … Wikipedia
enzyme — /en zuym/, n. Biochem. any of various proteins, as pepsin, originating from living cells and capable of producing certain chemical changes in organic substances by catalytic action, as in digestion. Cf. ase. [1880 85; < MGk énzymos leavened (Gk… … Universalium
Enzyme kinetics — is the study of the chemical reactions that are catalysed by enzymes, with a focus on their reaction rates. The study of an enzyme s kinetics reveals the catalytic mechanism of this enzyme, its role in metabolism, how its activity is controlled,… … Wikipedia
Enzyme — A protein (or protein based molecule) that speeds up a chemical reaction in a living organism. An enzyme acts as catalyst for specific chemical reactions, convertingt a specific set of reactants (called substrates) into specific products. Without … Medical dictionary
