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Sensitivity of l-arabinose transport by LAT-1 (A) and MtLAT-1 (B) to the proton uncoupler CCCP. S. cerevisiae strains expressing sugar transporters were incubated with the indicated concentration of CCCP for 10 min at 30°C. Subsequently, the rate at which the cells imported 5 mM l-arabinose was measured. The error bars indicate the standard deviations of the results of duplicate assays.
