Inosine(redirected from hypoxanthinosine)
Also found in: Dictionary, Thesaurus, Medical.
(hypoxanthine riboside), a nucleoside consisting of the nitride purine base hypoxanthine and the carbohydrate ribose. Inosine is the intermediate product of nucleic acid metabolism. It is formed in the organism during the deamination of adenosine and also by synthesis from a free base according to the reaction hypoxanthine + ribose- 1 -phosphate ⇆ inosine + phosphate. This reversible reaction is catalyzed by the enzyme nucleoside phosphorylase.