Fig. 1

Membrane currents recorded with 293TX cells. a Actual current traces. b Summarized data of current-voltage relations. c Differences in current densities at + 100 mV. Current densities with control, 10 μM ATP and 100 μM ATP were separately 37.9 ± 4.4 pA/pF, 61.0 ± 8.7 pA/pF and 119.3 ± 20.8 pA/pF. * P < 0.05 vs control (n = 8)