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Plastoquinone vs. Plastocyanin — What's the Difference?

Difference Between Plastoquinone and Plastocyanin


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Plastoquinone (PQ) is an isoprenoid quinone molecule involved in the electron transport chain in the light-dependent reactions of photosynthesis. The most common form of plastoquinone, known as PQ-A or PQ-9, is a 2,3-dimethyl-1,4-benzoquinone molecule with a side chain of nine isoprenyl units.
Dec 12, 2021


Plastocyanin is a copper-containing protein that mediates electron-transfer. It is found in a variety of plants, where it participates in photosynthesis.
Dec 12, 2021


(biochemistry) a quinone, related to the carotenoids, involved in the electron transport process of photosynthesis
Dec 12, 2021


(protein) A important copper-containing protein, involved in electron transfer
Dec 12, 2021

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