Figure 2.

Responses of a whole-cell clamped sensory process to puff-applied 250 mM sucrose for 5 s (shadowed bar). (A) Sucrose-induced depolarization of the membrane potential with increasing impulse frequency in a current clamp at zero current. (B) A sucrose-induced inward current developed with an increase in its fluctuation in the voltage clamp at −60 mV. (A and B) Traces were recorded successively from the same outside-out patch. The period of sucrose application (slanted bar) and the level (dotted line) of −50 mV (A) and zero current (B) are common.