. . . . "ATP + D-ribose-5-phosphate → 5-phospho-α-D-ribose 1-diphosphate + AMP + H+"^^ . "ATP + D-ribose-5-phosphate → 5-phospho-α-D-ribose 1-diphosphate + AMP + H⁺"^^ . "Phosphoribosyl pyrophosphate synthetase"^^ . "Phosphoribosyl diphosphate synthetase"^^ . "Ribose-phosphate diphosphokinase"^^ . "2.7.6.1"^^ . . . . . . . . . . . "ATP + D-ribose-5-phosphate → 5-phospho-α-D-ribose 1-diphosphate + AMP + H+"^^ .