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This family consists of the NADH-ubiquinone oxidoreductase B12subunit proteins. NADH is the central source of electrons in the mitochondrial and bacterial respiration. NADH-ubiquinone oxidoreductase is involved in the transfer of electrons from NADH to the electron transport chain. This oxidation of NADH is coupled to proton transfer across the membrane, generating a proton motive force that is utilised for the
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