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Anion-Specific Partitioning in Two-Phase Finite Volume Systems: Possible Implications for Mechanisms of Ion Pumps

Boström, M. ; Lima, E. R. A. ; Biscaia, E. C. ; Tavares, F. W. ; Nostro, P. Lo ; Parsons, D. F. ; Deniz, V. ; Ninham, B. W.



Abstract

In two-phase finite volume systems of electroneutral phospholipids, the electrolyte concentration is different in the two phases. The partitioning is highly anion-specific, a phenomenon not accounted for by classical electrolyte theories. It is explained if ionic dispersion forces that lead to specific ion binding are taken into account. The mechanism provides a contribution to active ion pumps not previously considered.


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