Integrated responses of the chorda tympani nerve of wild-type (+/+) and kcnq1-null (−/−) mice to tastants. Both wild-type and kcnq1-knockout mice showed robust responses to 100 mM NaCl, 10 mM HCl, 20 mM denatonium (Dena), 10 mM IMP, 100 mM MPG and the reference stimulus: 100 mM NH4Cl, and no significant differences in these responses between the two genotypes were found. Horizontal bars under nerve recordings show 30-second periods of taste stimulus application to the tongue.