SEARCH Articles Figures Tables 5- phosphoribosyl-l-pyrophosphate 5- phosphoribosyl-l-pyrophosphate PRPP) 5-Phosphoribosyl-1 -pyrophosphate PRPP) 5-Phosphoribosyl-1 -pyrophosphate purine biosynthesis 5-Phosphoribosyl-1 -pyrophosphate regulation 5-phosphoribosyl-pyrophosphate transferase Formation of 5-Phosphoribosyl-1-Pyrophosphate Glutamine 5-phosphoribosyl-l -pyrophosphate Phosphoribosyl Phosphoribosyl pyrophosphate amidotransferase Phosphoribosyl pyrophosphate analogues Phosphoribosyl pyrophosphate biosynthesis Phosphoribosyl pyrophosphate reactions Phosphoribosyl pyrophosphate synthase Phosphoribosyl pyrophosphate synthesis Phosphoribosyl pyrophosphate synthetase Phosphoribosyl pyrophosphate synthetase, increased Purine Phosphoribosyl pyrophosphate Pyrimidine Phosphoribosyl pyrophosphate