Single channel recording from planar bilayers containing
reconstituted OEP40.
A, single channel recordings in symmetrical
buffer conditions (250/250 mm KCl) from bilayers
containing a single active OEP40 channel in response to an
applied voltage gate of the indicated voltage amplitude
(Vm). B,
mean variance histogram of the current recording at
Vm = 100 mV
(top) and Vm =
−100 mV (bottom). C,
mean variance plot of the current recording at
Vm = 100 mV
(top) and Vm =
−100 mV (bottom). D,
current-voltage ramp (−100 to 100 mV, sweep-rate 15 mV/s)
of a single open OEP40 channel in symmetrical buffer (see
A). E, current-voltage
ramp (−80 to 80 mV, sweep-rate 15 mV/s) of a single open
OEP40 channel in asymmetrical buffer (250/20 mm KCl).
F, voltage-dependent open probability of
OEP40 single channels (n = 3).