A: mean (± SE) performance as a function of NaCl concentration for the T1R2 wild type (WT; top, ●) and T1R2 knockout (KO; top, ○), T1R3 WT (bottom, ●) and T1R3 KO (bottom, ○) groups. B: threshold distribution for individual female (○) and male (△) mice and the means (solid lines) and SE (dashed lines) for the T1R2 KO, T1R2 WT, T1R3 KO, and T1R3 WT genotype groups.