electron transport chain


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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.
References in periodicals archive ?
78,79) The mitochondrial electron transport chain also plays a role in producing testosterone in the Leydig cells.
As the photosynthetic process is turned on and electrons start flowing from PSII acceptors to downstream components of the electron transport chain the RCIIs reopen.
Such opportunities occur at three sites of the Krebs cycle, enter into the electron transport chain at a later position, and make only two molecules of ATP.
The control rates are much lower than the NADH-dependent O uptake rates, showing that little of the electron transport chain capacity was in use.
This leads to formation of acetate and NADH, which are then oxidized by the mitochondrial electron transport chain.
ETo/TRo = (1 - VJ)###probability (at t = 0) that a trapped exciton moves an electron into the electron transport chain beyond QA
CoQ 10 is an important amphipathic chemical that functions in the electron transport chain (ETC).
Reduced RNA processing inhibited the translation of proteins required to maintain the mitochondrial electron transport chain that consumes oxygen during cell respiration to produce energy.
Normally the major portion of ATP is produced in aerobic metabolism through the electron transport chain in the muscle mitochondria.
The electron transport chain is the major workhorse for creating ATP in living organisms, and yet there are very few ways to clearly illustrate the electron transport chain in the laboratory.
As mentioned earlier, ethanol metabolism by CYP2E1 and NADH oxidation by the electron transport chain generate ROS that results in lipid peroxidation.
In the November 2003 Journal of Neuroscience, Emory researchers Tim Greenamyre and Todd Sherer report that rotenone does its damage within the neuron's mitochondria by inhibiting a crucial enzyme in the electron transport chain known as complex I.

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