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. 2018 Nov 20;9:1339. doi: 10.3389/fphar.2018.01339

FIGURE 4.

FIGURE 4

ACh concentration–response relationship at human adult muscle nAChRs in the presence and absence of 1.8 μM quinine measured in Xenopus oocytes. Currents were elicited by various ACh concentrations. (A) Concentration-response curves for human adult muscle nAChRs in the presence (open circles) and the absence (filled circles) of 1.8 μM quinine (n = 6). (B) Relative current blocked by 1.8 μM quinine at 10, 30, and 100 μM ACh. Holding potential: -60 mV, error bars represent S.E.M.