Biology / Bio 0550 · Atom · ~20 seconds
The Electron Transport Chain, Overview
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The electron transport chain is a series of membrane protein complexes passing electrons from NADH and FADH2 to oxygen, pumping hydrogen ions across the membrane.
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Oxygen is the chain's final electron acceptor, combining with electrons and hydrogen ions to form water.
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The chain itself makes almost no ATP directly — it builds the gradient the next step spends.