Deiters' and Hensen cell K+ currents are insensitive to extracellular Cl−. Current traces obtained with 500-ms steps from −90 to 50 mV from a −40-mV holding potential. A: a, 150 mM Cl− control current of Deiters' cell; b, 5 mM Cl−; c, current-voltage relationship of IK of Deiters' cell for control (■) and 5 mM Cl− (○). B: a, 150 mM Cl− control current of Hensen cell; b, 5 mM Cl−; c, current-voltage relationship of IK in Hensen cell for control (■) and 5 mM Cl− (○).