FIGURE 2.

A, shown are concentration-response curves to ACh of oocytes injected with α7(L9′T) nAChR mRNA in the absence of MLA (■) and in the presence of 100 pm MLA (□) after a 3 min incubation. B, concentration-response curves to ACh of oocytes injected with a 1:1 shown is a ratio of α4β2 nAChR mRNA in the absence of MLA (■) and in the presence of 10 nm (▵), 30 nm (○), 200 nm (□), and 1 μm (♢) MLA after a 3-min incubation. Data are represented as the means ± S.E., and the curve-fitting procedure is as explained under “Experimental Procedures.”