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Protocol for measuring TEA sensitive potassium current. (A) The potassium current was measured with a step protocol from a –50 mV prepulse to -20 mV, as shown in the inset above the trace. This protocol was run a second time with 3 mM TEA (gray trace). (B) Offline subtraction yielded the TEA sensitive current. The TEA sensitive inactivating current was measured between the peak current and the steady state current end of the step.
