arabinogalactans
Plant cell-wall polysaccharides containing predominantly arabinose and galactose. Two main types are recognized: arabinogalactan 1, found in the pectin portion of angiosperms and containing a (1-4) -linked galactan and a -arabinose side-chains; arabinogalactan II, a highly branched polymer containing b (1-3) - and b (1-6) -linked galactose and peripheral a -arabinose residues. Arabinogalactan II is found in large amounts on some gymnosperms, especially larches, and is related to AGP.

Dictionary of molecular biology. 2004.

Look at other dictionaries:

  • pectin — Class of plant cell wall polysaccharide, soluble in hot aqueous solutions of chelating agents or in hot dilute acid. Includes polysaccharides rich in galacturonic acid, rhamnose, arabinose and galactose, eg. the polygalacturonans,… …   Dictionary of molecular biology

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