the activation reaction of the inhibitory guanine nucleotide-binding regulatory site of the adenylate cyclase system was studied in membranes of rat adipocytes , s49 lymphoma wild-type cells and their cyc- variants , pretreated without and with the bordetella pertussis toxin , islet-activating protein ( iap ) , by measuring the kinetics of adenylate cyclase inhibition by the stable gtp analogue , guanosine 5'- [ gamma-thio ] triphosphate ( gtp [ s ] ) .
C0018328
guanine nucleotide
C0018353
gtp