Figure 6. OsKAT1 or OsKAT2 expressed in CHO cells gives rise to voltage- and time-dependent inwardly rectifying K⁺ currents.

Current responses of cells in the control bath medium with 170 mM K-gluconate to the standard voltage protocol (inset: -20 mV holding potential, test potentials between -140 and +60 mV in steps of 20 mV) were recorded in the whole cell configuration. Upper, representative current traces elicited by command potential in cells transfected with various DNA as indicated. Lower, steady-state I/V relations of current densities collected at the end of test pulses as a function of clamp voltage are shown (n=5, 28, 19, and 13, from A to D, respectively).