Figure 5.
Absence of Na+-activated K+ channel-mediated currents at MFBs. A, Top, Voltage protocol applied to an MFB. Bottom, Current traces before (black) and after (red) wash-in of 1 μm TTX. Right, Same traces at higher temporal resolution. B, Collected data for current rise time and peak amplitude of four experiments of the kind in A, normalized to baseline. C, Top, MFB–AP wave applied to outside-out patches of MFBs. Middle, Averaged compound Kv current, isolated in TTX and Cd2+. Bottom, Composite current consisting of an inwardly directed Na+ and an outwardly directed K+ current component. Different MFB. D, Collected data of each eight recordings of isolated and composite currents as in C displaying rise times, peak current amplitudes, and half-durations.