3.2.2.14 5-phosphoribose 1-diphosphate PRPP, inorganic polyphosphates, affinity of 5-phosphoribose 1-pyrophosphate for the enzyme is dependent on the activator concentration , inhibition mechanism with 5-phosphoribose 1-pyrophosphate is competitive with GTP 29609 3.2.2.14 7-methylguanosine-5'-triphosphate - 108604 3.2.2.14 adenosine addition of 1.4 mM, inhibition 54.7% 122 3.2.2.14 ADP-ribose addition of 1-1.4 mM, inhibition 74.4% 402 3.2.2.14 AMP addition of 1.4 mM AMP, inhibition 92.5% 30 3.2.2.14 ATP - 4 3.2.2.14 Cd2+ 1 mM 52 3.2.2.14 CTP - 60 3.2.2.14 Cu2+ 1 mM 19 3.2.2.14 D-ribose-5-phosphate addition of 1.4 mM, inhibition 42.3% 2734