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Q-junction

From Bioblast


high-resolution terminology - matching measurements at high-resolution


Q-junction

Description

The Q-junction is a junction for convergent electron flow in the electron transfer system (ETS) from Complex I (CI), Complex II (CII), electron-transferring flavoprotein (CETF), glycerophosphate dehydrogenase complex (CGpDH), choline dehydrogenase and other enzyme complexes into the Q-cycle (ubiquinol/ubiquinone), and further to Complex III (CIII).

Abbreviation: Q

Reference: Gnaiger 2009 Int J Biochem Cell Biol, Gnaiger 2014 MitoPathways


MitoPedia methods: Respirometry 


MitoPedia topics: Enzyme 

Q-junction

Convergent CI&II-linked electron flow at the Q-junction, exerting an additive effect on flux, versus electron gaiting for separation of single input pathways (upper panel: Gnaiger 2009; lower panel: Hatefi 1962 J Biol Chem-XLII). From Fig. 1.5 in Gnaiger 2014 MitoPathways.


More details: »Respiratory complexes - more than five

» O2k-Publications: Q-Junction Effect