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pH Modulation of efflux pump activity of multi-drug resistant Escherichia coli ...

Martins, Ana; Spengler, Gabriella; Rodrigues, Liliana; Viveiros, Miguel; Ramos, Jorge; Martins, Marta; Couto, Isabel; Fanning, Séamus; Pagès, Jean Marie

BACKGROUND: Resistance Nodulation Division (RND) efflux pumps of Escherichia coli extrude antibiotics and toxic substances before they reach their intended targets. Whereas these pumps obtain their energy directly from the proton motive force (PMF), ATP-Binding Cassette (ABC) transporters, which can also extrude antibiotics, obtain energy from the hydrolysis of ATP. Because E. coli must pass through two pH dist...


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