| 释义 |
peroxidase Biochem.|pəˈrɒksɪdeɪz, -s|
Formerly also peroxydase.
[a. F. peroxydase (G. Linossier 1898, in Compt. Rend. des Séances de la Soc. de Biol. L. 373), f. peroxyde peroxide: see -ase.]
Any of a large class of iron-containing enzymes found esp. in plants which catalyse the oxidation of a substrate by peroxides, usu. hydrogen peroxide.
1903Jrnl. Chem. Soc. LXXXIV. i. 378 The substance is a very powerful peroxydase, and renders hydrogen peroxide..very active towards pyrogallol, gallic acid, aniline, [etc.]. 1907J. B. Cohen Org. Chem. Adv. Students I. ix. 357 Many other vegetable oxidases have been described, including the so-called ‘peroxidases’ which activate hydrogen peroxide and possibly other peroxides. 1925Jrnl. Chem. Soc. CXXVIII. i. 615 Peroxydases are found to be present in abundance in most common dried seeds in the resting condition. 1956New Biol. XXI. 46 The same haem is shared by all haemoglobins and myoglobins, as well as..other compounds of biological importance, notably the enzymes catalase and peroxidase. 1971New Scientist 25 Feb. 411/2 The presence of ethylene in a young pea cell causes an increase in the level of the enzyme peroxidase which is capable of tacking the OH group onto proline.
Hence peroxiˈdatic a., characteristic of a peroxidase.
1945Biochem. Jrnl. XXXIX. 300/2 It is conceivable that in addition to alcohols catalase may promote a peroxidatic oxidation of other biologically important substances. 1954A. White et al. Princ. Biochem. xvi. 368 The catalatic splitting of hydrogen peroxide to water becomes merely a special case of a peroxidatic reaction, where hydrogen peroxide serves both as substrate and as acceptor. Ibid., Catalase also exhibits peroxidatic activity. 1972I. Yamazaki et al. in Åkeson & Ehrenberg Struct. & Function Oxidation-Reduction Enzymes 326 Peroxidatic reactions are catalyzed in the presence of various non-specific catalysts, such as transition metal ions and their coordination complexes. |