galactose

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Related to Galactose metabolism: Fructose metabolism

galactose:

see lactoselactose
or milk sugar,
white crystalline disaccharide (see carbohydrate). It has the same empirical formula (C12H22O11) as sucrose (cane sugar) and maltose but differs from both in structure (see isomer).
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Galactose

A monosaccharide and a constituent of oligosaccharides, notably lactose, melibiose, raffinose, and stachyose. It is also known as d -galactose and cerebrose (see illustration). Agar, gum arabic, mesquite gum, larch arabo galactan, and a variety of other gums and mucilages contain d -galactose. See Agar, Monosaccharide

Structural formula for α - d -galactoseenlarge picture
Structural formula for α - d -galactose

l -Galactose (enantiomorph of d -galactose) occurs in several polysaccharides, including agar, flaxseed mucilage, snail galactogen, and chagual gum. Since d -galactose is usually also present, hydrolysis of these polysaccharides produces dl -galactose. See Carbohydrate

Galactose

 

a monosaccharide; one of the most frequently encountered natural hexahydric alcohols, a hexose. It differs from glucose in the spatial position of the groups around the fourth carbon atom. Galactose is readily soluble in water and only slightly soluble in alcohol. It exists in aliphatic and cyclic (pyranose, or furanose) forms, which are in a state of tautomeric equilibrium:

In plant tissues galactose is a component of raffinose, melibiose, and stachyose, as well as polysaccharides — galactans, pectins, saponins, various gums and mucilages, gum arabic, and so on. In the animal and human body galactose is a component of lactose (milk sugar), galactogen, group-specific polysaccharides, cerebrosides, and muco-proteins. Galactose is part of many bacterial polysaccharides and can be fermented by so-called lactose yeast. In animal and plant tissues, galactose readily changes to glucose, which is more assimilated and can be converted to ascorbic and galacturonic acids.

L. L. KHACHATRIAN

galactose

[gə′lak‚tōs]
(biochemistry)
C6H12O6 A monosaccharide occurring in both levo and dextro forms as a constituent of plant and animal oligosaccharides (lactose and raffinose) and polysaccharides (agar and pectin). Also known as cerebrose.
References in periodicals archive ?
Other possibilities would be the GALT-independent pathways, including the galactonate and UDP-glucose pyrophosphorylase pathways, in addition to some still unknown pathways as part of galactose metabolism (17).
Quantitative assessment of whole body galactose metabolism in galactosemic patients.
Based on these reports, HFG is likely one of the factors contributing to improvement of galactose metabolism of patients in our study.
The correlation between galactose metabolism and hepatic blood flow in patients under HD is complicated.
Galactose conversion to D-xylulose: an alternate route of galactose metabolism. Science 1966; 153:549-51.
The fundamental importance of human galactose metabolism: lessons from genetics and biochemistry.
Diagnosis of inherited disorders of galactose metabolism. Curr Protoc Hum Genet 2008;56:17.5.1-29.
A new method of screening for inherited disorders of galactose metabolism. J Lab Clin Med 1982;99:895-907.

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