The page discusses the mitochondrial electron transport system and oxidative phosphorylation, focusing on electron transport complexes I-IV. It describes each complex's structure, function, and electr...The page discusses the mitochondrial electron transport system and oxidative phosphorylation, focusing on electron transport complexes I-IV. It describes each complex's structure, function, and electron transfer mechanisms, including cofactors involved. The page details how electron transfer is linked to proton movement, establishing a proton gradient that drives ATP synthesis.