TABLE I.

Mean Value of n' for Various Experimental Conditions

Experimental Condition	Mean n' ± SEM	No. of Meas.
400 mM [Na]o /100 mM [Na]i
0 mV	1.07 ± 0.02a	13
−20 mV	1.06 ± 0.04	5
−40 mV	1.02 ± 0.04	6
100 mM [Na]o /100 mM [Na]i
−40 mV	1.04 ± 0.06	4
All data combined	1.05 ± 0.02a	28

^aAverages with P < 0.01.