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Substrate specificity of AtAPY1-GFP. The activity of AtAPY1-GFP in the presence of various substrates at pH 6.5 was measured. Different letters above the columns indicate mean values that are significantly different from one other (p<0.05, Tukey test). Error bars represent standard deviations of duplicate measurements from one reaction (see Methods). The data are representative of five activity assays with independent protein extracts. Abbreviation: Pi, inorganic phosphate.
