plastoquinone

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plas·to·quin·one (PQ),

(plas'tō-kwin'ōn),
2,3-Dimethyl-1,4-benzoquinone with a multiprenyl side chain; a trivial name sometimes used for plastoquinone-9.
References in periodicals archive ?
takes up two protons from the stromal side of the thylakoid membrane and forms the neutral plastoquinol ([Q.