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Effects of Complex I mutations were studied by modeling in NuoH, NuoJ or NuoK subunits of Escherichia coli NDH-1 by simultaneous optical monitoring of deamino-NADH oxidation and proton translocation and fitting to the data a model equation of transmembrane proton transport. A homolog of the ND1-E24 LHON/MELAS mutation caused 95% inhibition of d-NADH oxidation and proton translocation. The NuoJ-Y59F...
The chemiluminescent superoxide indicators lucigenin and coelenterazine were compared in rat liver submitochondrial particles and cytoplasmic membranes from Paracoccus denitrificans. Qualitative monitoring is possible with both probes, but quantitative work with lucigenin is hampered by its dependence on one-electron reduction before the photon-emitting reaction. Therefore, calibration of measurements...
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