TABLE 1.

Effect of pH and K⁺ on Na⁺ affinity for LeuT

The data are shown as mean values calculated from means of pIC₅₀ and the [S.E. interval] from pIC₅₀ ± S.E. based on the means from the triplicates within each experiment.

pH	Salt (800 mm)	Na+ Ki (mm)	n
8	ChCl	15 [14;17]	5
8	KCl	109 [95;125]	5
6	ChCl	42 [40;45]	4
6	KCl	64 [52;79]	4