Galacturonic Acid

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galacturonic acid

[gə¦lakt·yə¦rän·ik ′as·əd]
The monobasic acid resulting from oxidation of the primary alcohol group ofD-galactose to carboxyl; it is widely distributed as a constituent of pectins and many plant gums and mucilages.

Galacturonic Acid


(also called hexuronic acid), formed in organisms by oxidation of the primary hydroxyl of galactose to a carboxyl group. The presence of aldehyde, hydroxyl, and carboxyl groups makes galacturonic acid a polyfunctional compound.

Galacturonic acid is widespread in nature and is a structural component of a number of higher polysaccharides. Together with other uronic acids, it forms readily in plant tissues and is a component of gums, mucilages, and other substances. Pectins are esters of macromolecular polygalacturonic acids. Under the action of the enzyme decarboxylase in plants, galacturonic acid changes into arabinose.

References in periodicals archive ?
Therefore, quantitative evaluation of the enzyme activity from the standard curve of galacturonic acid displayed the maximum enzyme activity among the two strains of Bacillus i.
Polygalacturonase catalyzes the [alpha]-1,4 bonds between adjacent residues of galacturonic acid (SEYMOUR et al.
The pectic acid fraction contains mainly galacturonic acid and galactose as well as traces of glucose and arabinose (Reynolds, 2004, Hamman, 2008).
The overall objective of this project is to further establish the value chains based on MCF, arabinose (Ara) and galacturonic acid (GalA).
Chemicals used were sucrose, galacturonic acid, and [alpha]-cellulose (Sigma-Aldrich, St.
These are the most abundant acidic functional groups and the adsorption capacity of peels is directly related to the presence of these sites in pectin in the form of galacturonic acid.
Xylose, arabinose, and galaturonic acid were revealed as major monosaccharides of insoluble NSP whereas galacturonic acid, arabinose, and galactose ranged as third highest amounts in soluble NSP.
Lyases catalyze the trans-eliminative cleavage of the galacturonic acid polymer.
Uronic acid content in each supernatant was assayed according to Blumenkrantz and Asboe-Hansen (1973) using galacturonic acid (Sigma) as standard.
Intact citrus pectin molecules are long-chain, branched polysaccharides made from individual galacturonic acid molecules strung together.
Pectin or other pectic substances are heterogeneous group of high molecular weight, complex acidic structural polysaccharides with a backbone of galacturonic acid residues linked by [alpha](1-4) linkages (Kashyap et al.