this stimulation is observed in the presence of optimal concentrations of gtp , making it unlikely that guanyl nucleotides or enzymes which synthesize them are the sole stimulatory factors present in cellular cytosolic fractions , as suggested by ohashi and schatz ( ohashi , a. , and schatz , g. ( 1980 ) j. biol . chem . 255 , 7740-7745 ) .
C0007634
cellular
C1383501
cytosolic