TABLE 1.

K⁺ and Cl⁻ currents in a 1 M solution of KCl; the total currents are plotted in Fig. 3 a

Electric field (V/10 nm)	0.082	0.164	0.410	0.819
ICl (nA)	2.93	5.91	14.1	28.7
IK (nA)	2.66	5.35	12.8	26.0
ICl/IK	1.10	1.10	1.10	1.10