of the nucleotides ( atp , utp , itp , atp gamma s , appnhp , xtp , ctp , gtp , 8-br-atp and gtp gamma s ) that were active in stimulating inositol phosphate formation , only utp , atp , itp , atp gamma s and appnhp were active in stimulating secretion .
C0018353
gtp
C0079469
gtp