PBA inhibits other Kv channels.

(A) Time course of Shaker (inactivation removed) current measured in ND96 at +40 mV, 100 ms pulse when 10 mM PBA was applied through the bath solution. (B) Families of Shaker currents recorded before and during treatment with PBA. Currents were elicited by 100 ms step test potentials from −100 to +60 mV in 10 mV increments from a holding potential of −80 mV. Dashed line indicates zero current. Scale bars represent 1 µA and 0.1 s. (C) Time course of hERG current measured in ND96 at 0 mV, 2 s pulse when 10 mM PBA was applied through the bath solution. (D) Families of hERG currents recorded before and during treatment with PBA. Currents were elicited by 2 s step test potentials from −100 to +60 mV in 10 mV increments from a holding potential of −80 mV. Dashed line indicates zero current. Scale bars represent 1 µA and 0.5 s.