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40951
Membrane H+ conductance of Streptococcus lactis.

J Bacteriol, 1979/10;140(1):197-205.

Maloney PC

PMID: 40951

Impact factor: 3.476

Abstract
Membrane conductance to H+ was measured in the anaerobic bacterium Streptoccus 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 mumol of H+/s per p/ unit per g, dry weight (1.6 microS/cm2 of surface area). The pH insensitivity of this low basal H+ conductance supports the idea that a circulation of protons can mediate highly efficiency engery transductions across the membranes of bacteria.
MeSH terms
Cell Membrane; Dicyclohexylcarbodiimide; Electric Conductivity; Hydrogen; Hydrogen-Ion Concentration; Lactococcus lactis
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