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Example of current inhibition of both the delayed and the fast inactivating current by TEA 1 mM (a). Lower trace voltage step applied to the membrane. Vertical bars 1 nA (top) and 100 mV (bottom). Horizontal bar 2 ms. Example of inhibition of the fast inactivating potassium current by 4-amino pyridine (4-AP) 10−3 M (b). The fast potassium current is totally inhibited; only remains the delayed potassium current. Vertical bars 0.1 nA (top) and 1 mV (bottom). Horizontal bar 10 ms
