Kcna1 (A) mRNA and (B) protein were expressed to ~30-40% of wild-type levels in Kcna1+/− brain tissue and absent in Kcna1−/− mice brains. In contrast, Kcna1 mRNA and protein were not detected in lung tissue from all three genotypes. Significance was determined by a two-way ANOVA for tissue and genotype followed by Tukey’s multiple comparisons test, ***
p < 0.001 v. Kcna1+/+ and $
p < 0.05, $$
p < 0.01 v. Kcna1+/−, n = 3 per genotype. (C) Concentration-response curves demonstrating the maximal contractile response and the sensitivity to MCh of isolated trachea did not differ between Kcna1+/+ and Kcna1−/− mice (n = 4). Inset, concentration response curves normalized to the maximum contraction for each genotype. Significance was determined by a two-way ANOVA repeated measures for MCh concentration and genotype followed by Tukey’s multiple comparisons test.