the activity of phosphoribosylpyrophosphate ( prpp ) synthetase ( atp : d-ribose-5-phosphate pyrophosphotransferase , ec 2.7.6.1 ) is decreased in the erythrocyte in hereditary pyrimidine 5'-nucleotidase ( p5n ) deficiency .
C0035551
prpp
C0206339
pyrophosphotransferase