whereas basal enzyme activity was increased by these nucleotides , the stable gtp analogs decreased the adenylate cyclase activity stimulated by fluoride or forskolin by maximally 60 to 70 % , with the potency order , guanosine 5'-o- ( 3-thiotriphosphate ) ( gtp gamma s ) greater than guanyl-5'-ylimidodiphosphate greater than guanyl-5'-ylmethylenediphosphate .
C0018353
gtp
C0079469
gtp