the stable gtp analogues , gtp-gamma-s ( guanosine 5'- ( gamma-thio ) triphosphate ) and gmp-pnp ( guanosine 5'- ( beta , gamma-imido ) triphosphate ) , potentiated calcium-evoked catecholamine release in a dose-dependent manner .
C0018353
gtp
C0079469
gtp-gamma-s