Inhibition of CPH binding. Inhibition of CPH (50 µM) binding to liposomes containing PtdIns(3,4)P2 by myo-inositol pentakisphosphates (100 µM). Percent inhibition is plotted on the y-axis for the different IP5 isomers. Percent inhibition values are shown above the bars. Error bars represent +/- standard error of mean (SEM).