when added to the pipette , guanosine-3-thio-triphosphate ( gtp-gamma-s ) , a nonhydrolysable analogue of guanosine triphosphate , stimulated a 3.3-fold increase in membrane capacitance , which is indicative of mast cell degranulation ( fernandez , neher & gomperts , 1984 ) .
C0079469
gtp-gamma-s
C0018353
guanosine triphosphate