Definition of Pectin

"Pectin is partial methyl esters of polygalacturonic acid and their sodium, potassium, calcium and ammonium salts obtained by extraction in an aqueous medium of appropriate edible plant material, usually citrus fruits, apple & sunflower. In some type of pectins, a portion of the methyl esters may have been converted to primary amides by treatment with ammonia. Commercial product is normally diluted with sugars for standardization purpose. These are further specified to pH value, gel strength, viscosity, degree of esterification and setting characteristics."