Figure 1.

Potentiation of the response to capsaicin by low pH. DRG neuron was voltage clamped at −60 mV and capsaicin applied at pH 7.4 (single line) or pH 6.0 (double line) at either 10 nM (b, d) or 10 μM (c) as indicated. (a) shows response to pH 6.0 solution without capsaicin. Inward current downwards, responses to low pH alone not subtracted.