Electrically silent anion transport through bilayer lipid membrane induced by tributylin and triethyllead

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Abstract
The method of the measurement of the nonelectrogenic fluxes of hydrogen (or hydroxyl) ions (J H) based on the local proton gradients formation in the unstirred layers near a bilayer lipid membrane (BLM) is applied for recording the nonelectrogenic anion/OH− exchange on BLM induced by tributyltin (TBT) and a novel carrier (Hager, A., Moser, I., & Berthold, W. 1987.Z. Naturforsch.,42C∶1116–1120), triethyllead (TEL). This method has been used previously for measuring the cation fluxes through BLM. TBT and TEL are shown to be equally efficient in the induction of Cl−/OH− exchange.J H induced by TBT is constant at 4J H decreases at pH7. Both ionophores have a transport sequence: I−> Br−>Cl−>F−. The quatitative measurements reveal that TEL better discriminates these four anions than TBT. It is concluded that this method may prove helpful in a search and study of anion/OH−-exchangers isolated from natural membranes.