Plastoquinone

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Plastoquinone
Identifiers
CAS number 4299-57-4
PubChem 6433402
Properties
Molecular formula C53H80O2
Molar mass 749,20 g·mol−1
Related compounds
Related compounds 1,4-benzoquinone quinone Coenzyme Q10
Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)
Infobox references
Plastoquinone (oxidized form)

Plastoquinone, (often abbreviated PQ), is a quinone molecule involved in the electron transport chain in the light-dependent reactions of photosynthesis. Plastoquinone is reduced (accepts two protons (H+) from the stromal matrix of the chloroplast, coupled to two electrons (e-) from photosystem II), forming plastoquinol. It transports the protons to the lumen of thylakoid discs, while the electrons continue through the electron transport chain into the cytochrome b6f protein complex.

Plastoquinol (reduced form)

References

  • Berg, J; Tymoczko, J; Stryer, L (2002). Biochemistry (Fifth Edition), W H Freeman and Company. ISBN 0716746840. 

Wikipedia content modification information:

  • This page was last modified on 3 October 2008, at 18:05.

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