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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 ?
Photosystem II (PSII) of the photosynthetic apparatus is a multi subunit pigment-protein complex in the thylakoid membrane, which performs light-induced oxidation of water and reduction of plastoquinone.
is mediated by two photosystems, operating in series through a chain of redox transporters that comprises plastoquinone, the cytochrome [b.
Drugs profile discussed in this report include 2B3-201, adalimumab, ATXUV-1, ATXUV-2, B27-PD, celecoxib, CF-101, Col-Treg, Cytectin, dexamethasone acetate, Dexamethasone Sodium Phosphate-Visulex, Drugs to Inhibit Aldose Reductase for Immunology, Ophthalmology, Infectious Disease, Metabolic and Respiratory Disorders, EBI-028, EC-1496, EC-1669, fluocinolone acetonide, FR-104, gevokizumab, HL-036, IBI-70090, IMD-0354, INV-17, LFG-316, lodamin, NOP-3, NS-2, OX-1001, PA-2612, Peptides to Modulate TCR for Uveitis, plastoquinone decyl triphenylphosphonium bromide, PP-001, PPL-003, Recombinant Enzymes for Uveitis, sarilumab, sirolimus, Small Molecules to Inhibit Kinase for Uveitis and Inflammatory Bowel Disease, Stem Cell Therapy for Autoimmune Diseases, triamcinolone acetonide, V-404.
It is known that most PSII reaction centers are localized in the appressed region of the thylakoid membrane, within the grana stacks [6,7] and that diffusion of plastoquinone (PQ) is restricted to small membrane domains, including a few PSII centers [8,] Consequently, PQH2 generated by PSII can only be reoxidized by that fraction of cyt bf also localized in the appressed region ([approximately equal to] 47%) (6).
2[Alpha]] was to inhibit the successive PS-I reactions from plastoquinone through P700 to the methylviologen acceptance site in the electron transport chain.