PROTON MOTIVE FORCE
\pɹˈə͡ʊtɒn mˈə͡ʊtɪv fˈɔːs], \pɹˈəʊtɒn mˈəʊtɪv fˈɔːs], \p_ɹ_ˈəʊ_t_ɒ_n m_ˈəʊ_t_ɪ_v f_ˈɔː_s]\
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Energy that is generated by the transfer of protons or electrons across an energy-transducing membrane and that can be used for chemical, osmotic, or mechanical work. Proton-motive force can be generated by a variety of phenomena including the operation of an electron transport chain, illumination of a purple membrane, and the hydrolysis of ATP by a proton ATPase. (From Singleton & Sainsbury, Dictionary of Microbiology and Molecular Biology, 2d ed, p171)
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