| 释义 |
oxidase Biochem.|ˈɒksɪdeɪz, -s|
Also † oxydase.
[ad. F. oxydase (G. Bertrand 1896, in Compt. Rend. CXXII. 1217), f. oxyde oxide n.: see -ase.]
Orig., any enzyme which brings about oxidation (now called an oxidoreductase); now used only of such enzymes that react with molecular oxygen, esp. those that catalyse the transfer of hydrogen from a substrate to oxygen so as to form water or hydrogen peroxide (cf. oxygenase).
1896Chem. News 19 June 293/2 (heading) A new oxidase, or oxidising soluble ferment of vegetable origin. 1935Times Lit. Suppl. 28 Feb. 127 Xanthine oxidase is unable to attack nucleosides. 1946P. H. Mitchell Textbk. Biochem. xii. 340 Cytochrome Oxidase.—This enzyme specifically catalyzes the oxidation of cytochromes by molecular oxygen. 1956Sci. News XL. 43 When fresh or withered [tea] leaf is damaged it absorbs oxygen from the air with the aid of an enzyme, an oxidase, occurring in the leaf cells. 1964Rep. Internat. Union Biochem. Comm. on Enzymes in Florkin & Stotz Comprehensive Biochem. XIII. vi. 33 All enzymes catalysing oxido-reductions will be named ‘oxidoreductases’ in the systematic nomenclature... [In the trivial nomenclature] the terms ‘dehydrogenase’ or ‘reductase’ will be used much as hitherto... ‘Oxidase’ will be used only for cases where O2 acts as an acceptor, and ‘oxygenase’ only for those cases where the O2 molecule is directly incorporated into the substrate. 1970R. W. McGilvery Biochem. xvii. 407 Aromatic rings may be opened by oxidations utilizing a complete molecule of oxygen. Examples:..the oxidation of hydroxyanthranilate by hydroxyanthranilate oxidase. |