the cultured cells had basal activity which could be stimulated by guanosine triphosphate ( gtp , 2.3 fold ) , its non-hydrolysable analogue guanylyl-imido-diphosphate ( gpp [ nh ] p , 8.3 fold ) and sodium fluoride ( naf , 15.7 fold ) .
C0018353
gtp
C0018366
gpp [ nh ] p