Response profiles of three types of single fibres that responded to Glc and/or NaCl in the chorda tympani nerves of WT mice. Stimuli are 0.5 mol/L glucose (Glc), 10 mmol/L NaCl, 0.5 mol/L Glc + 10 mmol/L NaCl, 0.5 mol/L sucrose (Suc), 10 mmol/L HCl, 0.1 mol/L NaCl, 0.1 mol/L monopotassium glutamate (MPG), MPG + 0.5 mmol/L inosine monophosphate (IMP), 20 mmol/L quinine HCl (QHCl) and 0.1 mol/L CaCl2. Values indicated are mean impulse frequencies ± SE. paired t test; *P < .05. WT, wild-type