Phosphoribosyl pyrophosphate

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Phosphoribosyl pyrophosphate (PRPP) is a pentosephosphate.

The enzyme adenine phosphoribosyltransferase catalyzes the reaction between adenine and PRPP to form AMP.

The enzyme hypoxanthine-guanine phosphoribosyltransferase acts as a catalyst in the reaction between guanine and PRPP to form GMP.

The enzyme hypoxanthine-guanine phosphoribosyltransferase also acts as a catalyst in the reaction between hypoxanthine and PRPP to form IMP.

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