Sugars (monosaccharide) with five carbon atoms. Include ribose and deoxyribose of nucleic acids, and many others such as the aldoses arabinose and xylose, and the ketoses ribulose and xylulose.
A class of carbohydrates that contains five carbon atoms. ... (12 Dec 1998) ... Found on http://www.mondofacto.com/facts/dictionary?pentoses
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