Membrane H+ conductance of Streptococcus lactis

P. C. Maloney

Research output: Contribution to journalArticlepeer-review

64 Scopus citations


Membrane conductance to H+ was measured in the anaerobic bacterium S. lactis by a pulse technique employing a low driving force (0.1 pH unit; 6 mV). Over the pH range of 3.7 to 8.5, a constant value for passive H+ conductance was observed, corresponding to 0.2 μmol of H+/s per pH unit per g, dry weight (1.6 μS/cm2 of surface area). The pH insensitivity of this low basal H+ conductance supports the idea that a circulation of protons can mediate highly efficient energy transductions across the membranes of bacteria.

Original languageEnglish (US)
Pages (from-to)197-205
Number of pages9
JournalJournal of bacteriology
Issue number1
StatePublished - Dec 1 1979

ASJC Scopus subject areas

  • Microbiology
  • Molecular Biology


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