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Ribulose

D-erythro-pentulose; d-adonose; d-erythro-2-ketopentose;the 2-keto isomer of ribose. As the 5-phosphate, it participates in the pentose monophosphate shunt; as the 1,5-bisphosphate, it combines with co2 at the start of the photosynthetic process in green plants (carbon dioxide trap); d-ribulose is the epimer of d-xylulose.