In plant mitochondria, NADH dehydrogenase (complex I) and the cytochrome bc1 complex (complex III) form a I + III2 supercomplex, which is thought to stabilize the structure of the component complexes. Protein–protein interactions at three sites on the membrane arm of complex I partly resemble those in mammals, but also have plant-specific features.
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Møller, I.M. Super-complex supercomplex. Nat. Plants 9, 5–6 (2023). https://doi.org/10.1038/s41477-022-01329-1