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pectin

(Science: protein) 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, for example the polygalacturonans, rhamnogalacturonans and some arabinans, galactans and arabinogalactans. Prominent in the middle lamella and primary wall. Any of various water-soluble colloidal carbohydrates that occur in ripe fruit and vegetables; used in making fruit jellies and jams.A [[polysaccharide that can be found in a plants' [[cell wall.