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Representative series of photocurrents generated by GtCCR2 in a HEK293 cell at 150 (a) and 1.5 (b) mM Na+ in the bath. Eh was changed in 20-mV steps from −80 to 40 mV at the amplifier output (bottom to top). (c) The current-voltage relationship for the cell shown in (a) and (b). The data are the mean values mean ± SE (n = 3) corrected for liquid junction potentials.
