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Concentration-dependent effects of menthol. (A) Representative currents activated by ACh (30 μM) and ACh plus menthol (30 and 300 μM); (B) Bar graph of time constant; (C) the fraction of desensitized (D) receptors; and (D) the current integrals in response to the concentration of menthol from 10 to 300 μM, which was coapplied with 30 μM ACh. Data are the normalized means ± S.E.M. of three to six experiments.
