The membrane-spanning enzyme known as complex I couples the movement of electrons to that of protons as a way of converting energy. Crystal structures suggest how electron transfer drives proton pumping from afar.
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Ohnishi, T. Piston drives a proton pump. Nature 465, 428â429 (2010). https://doi.org/10.1038/465428a
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DOI: https://doi.org/10.1038/465428a
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