Table 4.

Statistical comparisons for nerve-recording data

	Df	F	p
WT (7) vs KO (8) (urethane)
Citric acid	52	5.22	0.017
HCl	39	3.29	0.009
Others	39	4.44	0.001
WT (6), pre vs post ODS injection (urethane)
Citric acid	40	0.81	0.004
HCl	30	5.45	0.011
Others	30	2.14	0.525
WT (4), pre vs post NaCl injection (urethane)
Citric acid	20	0.11	0.845
HCl	18	0.27	0.959
Others	18	0.12	0.979
WT (8) vs KO (7) (pentobarbital)
Citric acid	39	2.09	0.240
HCl	39	1.89	0.147
Others	52	1.52	0.209
WT, urethane (7) vs pentobarbital (8)
Citric acid	52	6.09	<0.001
HCl	39	6.74	<0.001
Others	39	10.19	<0.001
KO, urethane (8) vs pentobarbital (7)
Citric acid	42	0.58	0.632
HCl	42	0.44	0.728
Others	56	3.78	0.008
WT, pentobarbital (8) vs post-ODS (6)
Citric acid	36	2.30	0.094
HCl	26	0.73	0.540
Others	48	2.43	0.060

Degrees of freedom (Df), F-statistic, and p-values are for two-way ANOVAs comparing nerve recording data. Number of mice are in parentheses. For post hoc test results, see Figures 6 and 7. Citric acid and HCl, 3–20 mm. “Others,” 100 mm NH₄Cl, 500 mm sucrose, 100 mm NaCl, 300 mm MSG plus 100 μm ammiloride, and 10 mm quinine.