Galactose
A sugar contained in milk. Galactose makes up half of the sugar called lactose that is found in milk. Lactose is called a disaccharide, di meaning 2, since lactose is made up of two sugars, galactose and glucose, bound together. Galactose is metabolized (used) through the action of an enzyme called GALT (galactose-1-phosphate uridyl transferase).
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An aldohexose found (in d form) as a constituent of lactose, cerebrosides, gangliosides, mucoproteins, etc., in galactoside or galactosyl combination; an epimer of d-glucose.

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ga·lac·tose gə-'lak-.tōs, -.tōz n an optically active sugar C6H12O6 that is less soluble and less sweet than glucose and is known in dextrorotatory, levorotatory, and racemic forms

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n.
a simple sugar and a constituent of the milk sugar lactose. Galactose is converted to glucose in the liver. The enzyme necessary for this conversion is missing in infants with a rare inherited metabolic disease called galactosaemia.

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ga·lac·tose (gə-lakґtōs) [Gr. gala, gen. galaktos milk] an aldohexose epimeric with glucose at the 4 carbon but less soluble and less sweet, occurring naturally in both D- and L- forms (the latter in plants); it is a component of lactose and other oligosaccharides, cerebrosides and gangliosides, and various glycolipids and glycoproteins.

Medical dictionary. 2011.

Look at other dictionaries:

  • Galactose — Galactose …   Wikipedia

  • Galactose — Structure linéaire du D (+) Galactose, L (−) Galactose Général Nom IUPAC (2R,3S,4S,5R) penta …   Wikipédia en Français

  • galactose — [ galaktoz ] n. m. • 1793; « formation du lait dans les mamelles » 1665; du gr. galaktôsis ♦ Chim. Sucre, isomère du glucose, obtenu par hydrolyse du lactose ou de certaines gommes. ● galactose nom masculin (grec gala, lait) Aldohexose C6H12O6,… …   Encyclopédie Universelle

  • Galactose — Ga*lac tose, n. (Chem.) A white, crystalline sugar, {C6H12O6}, isomeric with dextrose, obtained by the decomposition of milk sugar, and also from certain gums. When oxidized it forms mucic acid. Called also {lactose} (though it is not lactose… …   The Collaborative International Dictionary of English

  • galactose — galactose. См. галактоза. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • Galactose — Galactose, Kohlenhydrat aus der Gruppe der ⇒ Monosaccharide; Aldohexose; Baustein von Di und Polysacchariden, so in den Pectinen der pflanzlichen Zellwände und in einigen Glykolipiden und Glykoproteinen. β D G. ist zusammen mit β D Glucose ein… …   Deutsch wörterbuch der biologie

  • galactose — |lâct| s. f. [Fisiologia] Conversão do sangue, quilo ou linfa em leite.   ‣ Etimologia: galacto + ose …   Dicionário da Língua Portuguesa

  • galactose — [gə lak′tōs΄] n. [ GALACT(O) + OSE2] a white, crystalline monosaccharide, prepared by the hydrolysis of lactose …   English World dictionary

  • Galactose — Strukturformel Offenkettige Darstellung in der Fischer Projektion Allgemeines Name …   Deutsch Wikipedia

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