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Updated: Aug 14, 2026

In vitro Investigation of the MexAB Efflux Pump From Pseudomonas aeruginosa
Published on: February 17, 2014
The phosphonium ion efflux system of Escherichia coli: relationship to the ethidium efflux system and energetic
Abstract:
The extent of accumulation of methyltriphenylphosphonium ion by Escherichia coli was shown to be dependent on the permeability of the outer membrane and the activity of an efflux system for this compound. Evidence consistent with the operation of a single efflux system for compounds such as phosphonium ions, phenanthridiniums and flavines is presented. Studies on the energy coupling mechanism for this efflux system indicated that it was driven by the transmembrane proton electrochemical gradient.
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