Figure 3. Ammonium efflux from HEK-293 cells.
Time course of fluorescence changes in WT and RhBG- or RhCG-expressing HEK-293 cells submitted to an outwardly directed 49 mmol NH4+ gradient are shown. Kinetics of pHi changes were analysed as described in Figure 2. The calculated acidification kinetic rate constants are shown. Smooth lines are exponential fits to the data.
