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Unitary current versus voltage relationships for the VIC channel in the plasma membrane of wheat roots. Solutions contained (cis:trans): A, 1:1; B, 1:10; C, 5:5; D, 10:50; E, 10:10; F, 50:10; G, 10:100; H, 50:50; I, 100:10; J, 100:100; K, 250:250; and L, 500:500 mm NaCl. The curves are derived from a 3B2S model for cation permeation using the parameters given in Table I.
