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Spondias purpurea L., popularly known as ciriguela, is native and widespread tree from Mexico through Northern Peru and Brazil, particularly in semi-arid zones. This tree exudes a water soluble polysaccharide, constituted of a (1→3) linked galactan backbone substituted at C6 with d-galactose, d-xylose, l-arabinose, l-rhamnose and glucuronic acid units. Brazilian polysaccharide differs from Venezuelan...