Cytoplasmic membrane protonmotive force energizes periplasmic interactions between ExbD and TonB.
Ollis AA, Manning M, Held KG, Postle K
Mol Microbiol. 2009 Aug;73(3):466-81. doi: 10.1111/j.1365-2958.2009.06785.x. Epub 2009 Jul 16.
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