Table 2.

Fractional magnitudes of time constants for ionic current, and fluorescence during the onset of SI in the presence of TTX

Channel variant (measured parameter) AF AI AS n 
WT (I) 70 nM TTX 0.12 ± 0.02 0.07 ± 0.03 0.50 ± 0.07 0.31 ± 0.09 
WT (I) 200 nM TTX 0.12 ± 0.03 0.06 ± 0.02a 0.42 ± 0.10 0.40 ± 0.10 11 
DI (F) + 200 nM TTX 0.13 ± 0.06 0.05 ± 0.02a 0.24 ± 0.07 0.59 ± 0.06a 
DII (F) + 200 nM TTX 0.13 ± 0.04 0.11 ± 0.04a 0.22 ± 0.05 0.54 ± 0.03a 
DIII (F) + 200 nM TTX 0.39 ± 0.05 0.05 ± 0.03 0.27 ± 0.07 0.30 ± 0.08 
DIV (F) + 200 nM TTX 0.27 ± 0.05 0.01 ± 0.00 0.09 ± 0.03 0.63 ± 0.08 
Channel variant (measured parameter) AF AI AS n 
WT (I) 70 nM TTX 0.12 ± 0.02 0.07 ± 0.03 0.50 ± 0.07 0.31 ± 0.09 
WT (I) 200 nM TTX 0.12 ± 0.03 0.06 ± 0.02a 0.42 ± 0.10 0.40 ± 0.10 11 
DI (F) + 200 nM TTX 0.13 ± 0.06 0.05 ± 0.02a 0.24 ± 0.07 0.59 ± 0.06a 
DII (F) + 200 nM TTX 0.13 ± 0.04 0.11 ± 0.04a 0.22 ± 0.05 0.54 ± 0.03a 
DIII (F) + 200 nM TTX 0.39 ± 0.05 0.05 ± 0.03 0.27 ± 0.07 0.30 ± 0.08 
DIV (F) + 200 nM TTX 0.27 ± 0.05 0.01 ± 0.00 0.09 ± 0.03 0.63 ± 0.08 

τF, τI, and τS and channel variant abbreviations are as in Table 1. p-values were calculated to evaluate differences between WT signals and those with TTX.

a

Significant differences, P < 0.05.

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