this binding was competitively inhibited by nucleotides and anions with the following ic50 concentrations in order of decreasing potency : atp = atp gamma s ( adenosine-5'-o- ( 3-thiotriphosphate ) ) = 0.2-0.3 microm , gdp beta s ( guanosine-5'-o- ( 2-thiodiphosphate ) ) = 2-3 microm , gtp gamma s ( guanosine-5'-o- ( 3-thiotriphosphate ) ) = 10-15 microm , adp = 20-25 microm , gtp = 30-40 microm , gmp-p ( nh ) p ( guanyl-5'-yl imidodiphosphate ) = 100-150 microm , gdp = 150-200 microm , pi = so4 ( 2- ) = 20 mm and cl- = acetate = 30-35 mm .
C0018353
gtp
C0018366
guanyl-5