5-Phosphoribosyl 1-diphosphate; d-ribose carrying a phosphate group on ribose carbon-5 and a pyrophosphate group on ribose carbon-1; an intermediate in the formation of the pyrimidine and purine nucleotides as well as NAD+. SYN: 5-phosphoribose 1-diphosphate.

Medical dictionary. 2011.

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