An electron transport chain(ETC) couples a chemical reaction between an electron donor (such as NADH) and an electron acceptor (such as O2) to the transfer of H+ ions across a membrane, through a set of mediating biochemical reactions. These H+ ions are used to produce adenosine triphosphate (ATP), the main energy intermediate in living organisms, as they move back across the membrane.
In mitochondria, it is the conversion of oxygen to water, NADH to NAD+ and succinate to fumarate that drives the transfer of H+ ions.
Source: Wikipedia (wikipedia:Electron_transport_chain)
Proteins on this pathway have targeted assays available via the CPTAC Assay Portal
Pitceathly RD, Rahman S, Wedatilake Y, Polke JM, Cirak S, Foley AR, Sailer A, Hurles ME, Stalker J, Hargreaves I, Woodward CE, Sweeney MG, Muntoni F, Houlden H, Taanman JW, Hanna MG; ''NDUFA4 mutations underlie dysfunction of a cytochrome c oxidase subunit linked to human neurological disease.''; Cell Rep, 2013 PubMedEurope PMCScholia
Balsa E, Marco R, Perales-Clemente E, Szklarczyk R, Calvo E, Landázuri MO, Enríquez JA; ''NDUFA4 is a subunit of complex IV of the mammalian electron transport chain.''; Cell Metab, 2012 PubMedEurope PMCScholia
Signes A, Fernandez-Vizarra E; ''Assembly of mammalian oxidative phosphorylation complexes I-V and supercomplexes.''; Essays Biochem, 2018 PubMedEurope PMCScholia