Un galactoside est un hétéroside ayant pour ose le galactose.
Selon le cas où la liaison osidique est au-dessous ou au-dessus du plan de la molécule de galactose, les galactosides sont classés en deux familles, les α-galactosides et les β-galactosides.
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galactoside — [galaktozid] n. f. ÉTYM. Mil. XXe; de galact , et oside. ❖ ♦ Chim. Composé dans lequel une molécule de galactose est liée à un alcool ou un autre ose. || Le lactose est un galactoside. 0 Ce système (dit « système Lactose ») gouverne la synthèse… … Encyclopédie Universelle
galactoside — [gə lak′tə sīd΄] n. 〚 GALACTOS(E) + IDE〛 any glycoside which contains galactose * * * ga·lac·to·side (gə lăkʹtə sīd ) n. Any of a group of glycosides that yield galactose on hydrolysis. * * * … Universalium
galactoside — [gə lak′tə sīd΄] n. [ GALACTOS(E) + IDE] any glycoside which contains galactose … English World dictionary
Galactoside — A galactoside is a glycoside containing galactose. The H of the OH group on carbon 1 of galactose is replaced by an organic moiety. Depending on whether the glycosidic bond lies above or below the plane of the galactose molecule, galactosides are … Wikipedia
galactoside — gəˈlaktəˌsīd, sə̇d noun ( s) Etymology: galactose + ide : a glycoside that yields galactose on hydrolysis methol galactoside … Useful english dictionary
Galactoside O-acetyltransferase — Galactoside O acetyltransferase, or Thiogalactoside transacetylase, (EC number|2.3.1.18) is an enzyme, which is a product of the lacA gene in E. coli .Catalyzed reaction:acetyl CoA + beta D galactoside → CoA + 6 acetyl beta D galactosideee alsoβ… … Wikipedia
Galactoside 2-alpha-L-fucosyltransferase — In enzymology, a galactoside 2 alpha L fucosyltransferase (EC number|2.4.1.69) is an enzyme that catalyzes the chemical reaction:GDP beta L fucose + beta D galactosyl R ightleftharpoons GDP + alpha L fucosyl 1,2 beta D galactosyl RThus, the two… … Wikipedia
galactoside — noun Date: 1862 a glycoside that yields galactose on hydrolysis … New Collegiate Dictionary
galactoside — noun Any of several glycosides containing galactose … Wiktionary
galactoside — A compound in which the H of the OH group on carbon 1 of galactose is replaced by an organic moiety. * * * ga·lac·to·side gə lak tə .sīd n a glycoside that yields galactose on hydrolysis * * * ga·lac·to·side (gə lakґto sīd) a glycoside… … Medical dictionary
