Fig. 4. (A) The effect of 10 mmol l^–1 sodium propionate (Prop) applied first apically (a) then basolaterally (b), on K⁺ current. K32, standard saline (see Materials and methods). (B) Percentage of control K⁺ current (I_K) before and after treatment with 20 mmol l^–1 basolateral ammonium chloride (left side, N=4) and before and after 10 mmol l^–1 apical or basolateral propionate (Prop) (right side, N=4). Values are means + S.E.M.

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