Table 1.
Mean K0.5 and Imax from [K+o] dependence
K0.5 for K+o (mM)Imax (nA)
Condition−100 mV0 mV≥150 nA, 0mVn
α1β1 1.6 ± 0.3 0.9 ± 0.2 365 ± 144 24 
FXYD1 2.0 ± 0.4** 1.2 ± 0.2** 275 ± 110 32 
FXYD2 1.0 ± 0.3** 1.0 ± 0.3 290 ± 43 8 
FXYD4 2.8 ± 0.6** 1.5 ± 0.1** 330 ± 117 8 
FXYD6 1.4 ± 0.2 1.2 ± 0.2** 340 ± 66 11 
FXYD7 2.4 ± 0.3** 1.4 ± 0.2** 278 ± 86 9 

Mean K0.5 values at −100 mV and 0 mV. Errors represent SD; n is the number of experiments. **, Significantly different with respect to α1β1 alone by t test: P < 0.001.

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