释义 |
catalase
cat·a·lase C0152800 (kăt′l-ās′, -āz′)n. An enzyme found in living cells that catalyzes the decomposition of hydrogen peroxide, a potentially harmful oxidizing agent, into water and oxygen. [catal(ysis) + -ase.] cat′a·lat′ic (kăt′l-ăt′ĭk) adj.catalase (ˈkætəˌleɪs) n (Biochemistry) an enzyme that catalyses the decomposition of hydrogen peroxidecat•a•lase (ˈkæt lˌeɪs, -ˌeɪz) n. an enzyme that decomposes hydrogen peroxide into oxygen and water. [1900–05; catal (ysis) + -ase] cat`a•lat′ic (-ˈæt ɪk) adj. ThesaurusNoun | 1. | catalase - enzyme found in most plant and animal cells that functions as an oxidative catalyst; decomposes hydrogen peroxide into oxygen and waterenzyme - any of several complex proteins that are produced by cells and act as catalysts in specific biochemical reactions | TranslationsCatalase
catalase[′kad·əl‚ās] (biochemistry) An enzyme that catalyzes the decomposition of hydrogen peroxide into molecular oxygen and water. Catalase an enzyme of the hydroperoxidase group that catalyzes the oxidation-reduction reaction during which water and oxygen are formed from two molecules of hydrogen peroxide: 
Catalase is obtained in crystalline form; its molecular mass is 250, 000. The enzyme is widely distributed in the cells of animals, plants, and microorganisms. It is a chromoprotein having an oxidized heme as a prosthetic (nonprotein) group. Since the specificity of catalase for a substrate-reducing agent is low, it can catalyze not only the decomposition of H202 but also the oxidation of the lower alcohols. The function of catalase is to destroythe toxic hydrogen peroxide that forms in the body during vari-ous oxidative processes. catalase
catalase [kat´ah-lās] a hemoprotein" >hemoprotein enzyme that specifically catalyzes the decomposition of hydrogen peroxide and is found in almost all cells except certain anaerobic bacteria. Deficiency results in acatalasia." >acatalasia. adj., adj catalat´ic.cat·a·lase (kat'ă-lās), [MIM*115500] A hemoprotein catalyzing the decomposition of hydrogen peroxide to water and oxygen (2H2O2 → O2 + 2H2O); a deficiency of catalase is associated with acatalasemia.catalase (kăt′l-ās′, -āz′)n. An enzyme found in living cells that catalyzes the decomposition of hydrogen peroxide, a potentially harmful oxidizing agent, into water and oxygen. cat′a·lat′ic (kăt′l-ăt′ĭk) adj.CAT A gene on chromosome 11p13 that encodes catalase, an enzyme which plays a central role in the body’s defence against oxidative stress, converting the reactive oxygen species hydrogen peroxide (H2O2) to water and oxygen, thereby mitigating H2O2’s toxic effects. Molecular pathology Defects in CAT cause acatalasemia. Oxidative stress may play a role in the development of chronic or late-onset diseases—e.g., diabetes, asthma, Alzheimer's disease, systemic lupus erythematosus, rheumatoid arthritis and cancer.cat·a·lase (kat'ă-lās) A hemoprotein catalyzing the decomposition of hydrogen peroxide to water and oxygen (2H2O2→ O2 + 2H2O). catalase An ENZYME found in the microbodies (peroxisomes) of cells and that promotes the reaction in which two molecules of hydrogen peroxide are converted to two molecules of water and one molecule of oxygen.catalase an iron-containing ENZYME found in tissues such as liver and potato tubers whose function is to catalyse the breakdown of toxic hydrogen peroxide, a by-product of aerobic respiration, into water and oxygen: Catalase has the highest known TURNOVER RATE and works by reducing the ACTIVATION ENERGY required from about 80 kJ to less than 10 kJ. See CAT See CECOM Accreditation Teamcatalase
Words related to catalasenoun enzyme found in most plant and animal cells that functions as an oxidative catalystRelated Words |