| 释义 |
galactoside Chem.|gəˈlæktəsaɪd|
[a. F. galactoside (M. Berthelot Chim. org. fondée sur la Synthèse (1860) II. iii. iii. 286), f. galactose + -ide.]
Any glycoside in which the sugar is galactose. Hence gaˌlactoˈsidase, any enzyme that hydrolyses a galactoside to galactose and an aglycone; galactoˈsidic a., of, pertaining to, or characterized by a galactoside.
1862H. Watts tr. Gmelin's Hand-bk. Chem. XV. 317 He [sc. Berthelot] then subdivides the saccharides into—glucosides..; levulosides..; galactosides. 1902Jrnl. Chem. Soc. LXXXII. i. 263 Tetra-acetyl-β-phenolgalactoside, C20H24O10, crystallises from dilute alcohol or from benzene in stout prisms... This galactoside is not hydrolysed by yeast extract. 1917Chem. Abstr. XI. 2819 (heading) Detection of β-galactosidase in the vegetable kingdom. 1950Jrnl. Bacteriol. LX. 390 Several of the problems of the enzyme chemistry of galactosidase..require the use of preparations more highly purified than can be readily accomplished with bacterial enzymes. 1952Biol. Abstr. 2533/2 The formation of beta-galactosidase (I) by E. coli is induced exclusively by substances possessing an intact galactosidic radical. 1956Nature 10 Mar. 478/2 Only enzymes capable of splitting α-glucoside and α-galactoside linkages were required to be present. |