Abstract
1. 1. A polysaccharide fraction was isolated from the mucilaginous layer of coffee cherries. 2. 2. This purified fraction was found to contain 77.6% anhydrogalacturonic acid residues, and small amounts of arabinose, xylose galactose, and rhamnose. 3. 3. The sugars were removed by hydrolysis with dilute acid, and barium galacturonate was isolated in good yield from the sugar-free residue. 4. 4. Coffee mucilage fractions responded to acid and enzymatic hydrolyses in a manner very similar to citrus pectic acid.
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