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Galactans

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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Galactans

 

(C6H10O5)n, where n≈120, higher polysaccharides, occurring in plant tissues as reserve carbohydrates and structural elements of cell walls, as well as in animal tissues. The main elementary units of galactans are pyranose residues of galactose, joined by glycoside bonds between the first through fourth, as well as first through third and first through sixth, carbon atoms. Galactan metabolism has been little studied. Galactans form the carbohydrate part of agar and are a component of pectins and many plant gums, mucilages, and so on.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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References in periodicals archive
Chemical structure and anticoagulant activity of highly pyruvylated sulfated galactans from tropical green seaweeds of the order Bryopsidales.
According to the stereochemistry, specifically galactans with 4-linked-[alpha]-galactose residues of the L-series are termed agarans and those of the D-series are termed carrageenans (or DL-hybrids) (Cardozo et al., 2007; Maciel et al., 2008; Prajapati et al., 2014).
Carrageenans and galactans are the important sulfated polysaccharides in red algae.
Pehk, "Gel-forming structures and stages of red algal galactans of different sulfation levels," Journal of Applied Phycology, vol.
Herbal Immune Support Formula combines key antioxidant vitamins and minerals with standardized extracts of echinacea, goldenseal and numerous synergistic botanicals, and Arabinogalactans/ Olive Leaf Complex provides pure arabino galactans plus premier olive leaf extract for maximum immune response support.
The TB microbe adds to that another layer of sugars, called galactans and arabinans.
Moreover, brown and red algae contain polysaccharides like alginates, fucoidans, laminarans and galactans that make their cells mucilaginous, hence, absorbent to minerals and other nutrients (Giusti 2001, Hashim & Chu 2004, Lodeiro et al.
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