(a) Representative current traces of Xenopus laevis oocytes expressing ELIC, showing ethanol inhibition of the current elicited by the agonist propylamine (PPA). The horizontal and vertical scale bars represent 1 μA and 30 sec, respectively. (b) Concentration-dependent inhibition of ELIC by n-alcohols. All data were normalized to the current at EC20 in the absence of alcohols and fit to the Hill equation (solid lines, n ≥ 6). The best-fit IC50 values for ethanol (•), 2-bromoethanol (×), n-propanol (○), n-butanol (▲), n-hexanol (□), and n-nonanol (◆) are reported in the main text as the mean ± SEM. Error bars less than the symbols sizes are not visible.