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Oxidative phosphorylation (OXPHOS) is the main source of energy in eukaryotic cells. This process is performed by means of electron flow between four enzymes, of which three are proton pumps, in the inner mitochondrial membrane. The energy accumulated in the proton gradient over the inner membrane is utilized for ATP synthesis by a fifth OXPHOS complex, ATP synthase. Four of the OXPHOS protein complexes...
The five complexes (complexes I–V) of the oxidative phosphorylation (OXPHOS) system of mitochondria can be extracted in the form of active supercomplexes. Single-particle electron microscopy has provided 2D and 3D data describing the interaction between complexes I and III, among I, III and IV and in a dimeric form of complex V, between two ATP synthase monomers. The stable interactions are called...
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