5'-guanosine gamma-thiotriphosphate ( gtp gamma s ) and 5'-guanylyl imidodiphosphate ( gpp ( nh ) p ) , nonhydrolyzable analogs of gtp , stimulated ip3 formation in the absence of trh with half-maximal potencies of 162 +/- 50 and 7500 +/- 4300 nm , respectively .
C0018366
gpp ( nh ) p
C0018353
gtp