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plas·to·quin·one (PQ),

2,3-Dimethyl-1,4-benzoquinone with a multiprenyl side chain; a trivial name sometimes used for plastoquinone-9.
References in periodicals archive ?
The duration of the inhibitory effect, as tested here and in the previous study [19], was, in both cases, related to the nature of the antioxidant moiety, decreasing in the series [alpha]-tocopherol ~ ubiquinol > plastoquinol, independently of the rest of the structure of the antioxidant; compare Figures 5-7, 9, and 10, Table 1, and [19].
Flexibility in photosynthetic electron transport: the physiological role of plastoquinol terminal oxidase (PTOX).
takes up two protons from the stromal side of the thylakoid membrane and forms the neutral plastoquinol ([Q.