the guanosine 5'-triphosphate analogue , 5'-guanylyl-imidodiphosphate , produced about a threefold enhancement of basal and parathyroid hormone-stimulated enzyme activities under standard conditions ( 5 mm mg+2 , 1mm atp , ph 8.0 , 30 degrees c ) .
C0018353
guanosine
C0018366
guanylyl-imidodiphosphate