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Single channel records from oocytes expressing αγ or αγT channels. Pipette solution was 150 mM LiCl, and 0.1 μM amiloride was present where indicated (+amil ). Low P o, P o < 0.25; high P o, P o > 0.65. −Vp has the same meaning as Fig. 1. The time scale and current amplitude are indicated on the scale bar.
