Abstract
According to Cohen and Monod (1956) the term ‘permeases’ designates specific transport mechanisms which are distinct from metabolic processes. Permeases usually participate in active transport: inside the cells the transported substrates are at a higher electrochemical potential than in the medium. The intracellular accumulation is associated with an increase of respiration and is sensitive to metabolic inhibition. When the rate of metabolism of a substrate exceeds that of its transport its intracellular concentration remains lower than that of the medium; in such instances permeases mediate downhill transport. Such processes do not require the provision of metabolic energy.
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Kepes, A. (1969). Bacterial Permeases. In: Passow, H., Stämpfli, R. (eds) Laboratory Techniques in Membrane Biophysics. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-87259-4_6
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DOI: https://doi.org/10.1007/978-3-642-87259-4_6
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