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. 1974 Oct;144(1):87-90.
doi: 10.1042/bj1440087.

Proton/sodium ion antiport in Escherichia coli

I C West, P Mitchell

Proton/sodium ion antiport in Escherichia coli

I C West et al. Biochem J. 1974 Oct.

Abstract

In anaerobic suspensions of Escherichia coli, after H(+) ions have been translocated outwards across the plasma membrane by a respiratory pulse, re-equilibration is catalysed by Na(+). The sudden addition of a Na(+) salt causes the effective outward translocation of H(+) by an electroneutral process. We conclude that the plasma membrane of E. coli contains a Na(+)/H(+) antiport system that normally translocates Na(+) outwards under the influence of an inwardly directed H(+)-activity gradient.

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