| 释义 |
phytase Biol.|ˈfaɪteɪz, -s|
[a. G. phytase (U. Suzuki et al. 1907, in Bull. College Agric. (Tokyo Imperial Univ.) VII. 503): see phyt- and -ase.]
Any of a class of enzymes found esp. in cereals and yeast which convert phytic acid to myo-inositol and phosphoric acid.
1908Jrnl. Chem. Soc. XCIV. i. 236 The change is shown to be due, not to putrefaction, but to an enzyme, phytase, which was isolated from rice bran and wheat bran. 1931E. C. Miller Plant Physiol. xi. 632 The glucoside phytin is decomposed into phosphoric acid and inosite, C6H12O6, by the action of the enzyme phytase. 1947Nature 18 Jan. 99/2, 25 ml. of the solution correspond to the phytase activity of about 15gm. barley. 1966Nowakowski & Clarke tr. Kretovich's Princ. Plant Biochem. vi. 215 The phytases of yeasts and flour split much of the inositol-phosphoric acid during fermentation of dough. 1975Science 7 Feb. 432/3 A phytase which we extracted and purified from wheat bran. |