Additive effect of convergent electron flow
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Electron flow converges at the Q-junction from respiratory Complexes I and II (CI+II e-input), glycerophosphate dehydrogenase and electron-transferring flavoprotein. Convergent electron flow corresponds to the operation of the TCA cycle and mitochondrial substrate supply in vivo.
Additive effect
Due to the additive effect of convergent CI+II electron flow on respiratory flux, respiration is increased up to 2-fold relative to flux supported only by Complex I substrates.
References
- Gnaiger E (2009) Mitochondrial pathways through Complexes I+II: Convergent electron transport at the Q-junction and additive effect of substrate combinations. Mitochondr. Physiol. Network 12.12: 1-20.
- Gnaiger E (2009) Capacity of oxidative phosphorylation in human skeletal muscle. New perspectives of mitochondrial physiology. Int. J. Biochem. Cell Biol. 41: 1837–1845.
