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 language||English (US)|
|Number of pages||9|
|Journal||Journal of bacteriology|
|State||Published - Dec 1 1979|
ASJC Scopus subject areas
- Molecular Biology