Effect of IKir activation on voltage-dependent di-8-ANEPPS transients
A and B, di-8-ANEPPS transients elicited by step voltage clamp pulses (to +40,+20, −40, −80, −120 and −160 mV) are represented by traces a–f, respectively, efore (A) and after (B) blocking IKir. C and D, corresponding currents for A and B, respectively. Fibre diameter, 59 μm; length, 556 μm; capacitance, 5.9 μF cm−2.