1-(5-phospho-beta-D-ribosyl)-ATP + diphosphate = 5-phospho-alpha-D-ribose 1-diphosphate + ATP
1-(5-phospho-beta-d-ribosyl)-atp + diphosphate = 5-phospho-alpha-d-ribose 1-diphosphate + atp
"phosphoribosyl-ATP diphosphorylase"
"phosphoribosyl-atp diphosphorylase"