while gdp produced only very minor effects , stimulation of the amoebae ( in the absence of added cyclic amp ) with gtp or the non-hydrolysable gtp analogues gtp gamma s ( guanosine 5'-o- ( 3-thio-triphosphate ] and gpp ( nh ) p ( 5'-guanylylimidodiphosphate ) induced transient formation of ip3 in an oscillatory manner , with peaks similar in magnitude and timing to those elicited by cyclic amp .
C0018353
guanosine
C0018366
guanylylimidodiphosphate