Proton/sodium ion antiport in Escherichia coli.
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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.
SUBMITTER: West IC
PROVIDER: S-EPMC1168467 | biostudies-other | 1974 Oct
REPOSITORIES: biostudies-other
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