Table 2.

Sensitivity and LOD in Site 1 (GOx only) and Site 2 (GOx + GABAse).

GABA concentration (μM)	Sensitivity (nA μM-1cm-2)		LOD (μM)
	Site-1	Site-2	Site-1	Site-2
0	90 ± 5∗	132 ± 13	0.27 ± 0.02	0.08 ± 0.008
5	104 ± 8	146 ± 16	0.23 ± 0.01	0.08 ± 0.007∗
10	106 ± 10	154 ± 19	0.22 ± 0.01	0.07 ± 0.008
20	104 ± 12	164 ± 21	0.23 ± 0.02	0.07 ± 0.009

Error value is shown as mean ± SEM. Two-tailed Students t-test was performed (n = 6, p < 0.0001, ^∗p < 0.05). One-way ANOVA was performed (n = 6, p < 0.0001) to verify that sensor-to sensor variation (in the same site) is not significant.