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. 2012 Feb 27;109(11):4308–4313. doi: 10.1073/pnas.1115488109

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Fig. 2. — Chicken recombinant α9α10 nAChR has lower relative calcium permeability. (A) Representative I-V curves obtained on application of voltage ramps (−120 to +50 mV, 2 s) at the plateau of the response to 10 μM (α9α10) or 100 μM (α4β2) ACh in oocytes superfused with N-methyl glucamine–based solutions containing different Ca²⁺ concentrations for oocytes expressing rat α9α10 (Upper Left), rat α4β2 (Upper Right), or chicken α9α10 nAChRs (Lower Left). (Insets) Magnification near the E_rev. (B) Plots of E_rev values as a function of Ca²⁺ concentration for rat α9α10, rat α4β2, and chicken α9α10 nAChRs. Values are mean ± SEM of n = 5–8 per point.