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Galactose (/ ɡ ə ˈ l æ k t oʊ s /, galacto-+ -ose, "milk sugar"), sometimes abbreviated Gal, is a monosaccharide sugar that is about as sweet as glucose, and about 65% as sweet as sucrose. [3] It is an aldohexose and a C-4 epimer of glucose. [4] A galactose molecule linked with a glucose molecule forms a lactose molecule.
Monosaccharides can be classified by the number x of carbon atoms they contain: triose (3), tetrose (4), pentose (5), hexose (6), heptose (7), and so on. Glucose, used as an energy source and for the synthesis of starch, glycogen and cellulose, is a hexose. Ribose and deoxyribose (in RNA and DNA, respectively) are pentose sugars.
The chair conformation of six-membered rings have a dihedral angle of 60° between adjacent substituents thus usually making it the most stable conformer. Since there are two possible chair conformation steric and stereoelectronic effects such as the anomeric effect, 1,3-diaxial interactions, dipoles and intramolecular hydrogen bonding must be taken into consideration when looking at relative ...
Based on total weight, regular commercial brown sugar contains up to 10% molasses. Buttered syrup [1] Cane sugar (cane juice, cane juice crystals), contains a high concentration of sucrose. [1] Caramel – made of a variety of sugars [1] Carob syrup – made from carob pods [1] Caster sugar [1] Coconut sugar [1] – 70-79% sucrose and 3-9% ...
It is used as a high-fructose syrup, which is manufactured from hydrolyzed corn starch that has been processed to yield corn syrup, with enzymes then added to convert part of the glucose into fructose. [74] Galactose generally does not occur in the free state but is a constituent with glucose of the disaccharide lactose or milk sugar. It is ...
The following other wikis use this file: Usage on ar.wikipedia.org سكر مختزل; Usage on azb.wikipedia.org گلوکوز; Usage on bg.wikipedia.org
Even if all three component sugars are the same (e.g., glucose), different bond combinations (regiochemistry) and stereochemistry (alpha- or beta-) result in trisaccharides that are diastereoisomers with different chemical and physical properties.
The following other wikis use this file: Usage on cs.wikipedia.org Ketózy; Usage on de.wikipedia.org Ketosen; Usage on es.wikipedia.org Agroquímica