electron transport chain

(redirected from Electron transport complex iv)

e·lec·tron trans·port chain

(ĕ-lek'tron trans'pōrt chān)
The final common pathway in aerobic (oxidative) metabolism. Oxygen is a cofactor.

electron transport chain

The stage of cellular respiration in which the most adenosine triphosphate is generated. In this biochemical reaction, electrons are passed along the cytochromes of a cell or mitochondrial membrane and are ultimately accepted by oxygen, producing water. Hydrogen ions (protons) are transported across the membrane. The source of the protons and electrons is primarily nicotinamide adenine dinucleotide, which is recycled during the reaction.
Synonym: cytochrome transport system
See also: chain

electron transport chain

a group of specific carrier molecules in the inner mitochondrial membrane that transfer electrons from hydrogen to oxygen. Electrochemical energy generated via electron transport is transferred to ADP to reform ATP. See also oxidative phosphorylation.
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