A semiquinone intermediate generated at the Qo site of the cytochrome bc1 complex: Importance for the Q-cycle and superoxide production. Supplementary figures, detailed experimental procedures. O/O B 5 Electron carriers. The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Comparison of photoelectrochemical water oxidation activity of a synthetic photocatalyst system with photosystem II. Wangyin Wang, Zhen Li, Jun Chen, and Can Li . > Which are the mobile electron carriers in the chloroplast ETC ? Carotenoid Oxidation in Photosystem II:  1D- and 2D-Electron Spin−Echo Envelope Modulation Study. Does the water-oxidizing Mn4CaO5 cluster regulate the redox potential of the primary quinone electron acceptor QA in photosystem II? without permission from the American Chemical Society. Deepak Kumar Yadav, Ankush Prasad, Jerzy Kruk, Pavel Pospíšil, . Maryam Seif Eddine, Frédéric Biaso, Rodrigo Arias‐Cartin, Eric Pilet, Julia Rendon, Sevdalina Lyubenova, Farida Seduk, Bruno Guigliarelli, Axel Magalon, Stéphane Grimaldi. N Labeling, HYSCORE Spectroscopy, and DFT Modeling. Die Kombination einer auf Photosystem 1 basierenden Photokathode und einer auf Photosystem 2 basierenden Photoanode zu einem Z-Schema-Analogon für biophotovoltaische Anwendungen. Photoelectrode for Solar Water Oxidation. C Photosynthesis: From Natural to Artificial Primary plastoquinone electron acceptor in PSII. pH-Dependent Regulation of the Relaxation Rate of the Radical Anion of the Secondary Quinone Electron Acceptor QB in Photosystem II As Revealed by Fourier Transform Infrared Spectroscopy. electron transfer in the quinone binding region, and in Abbreviations: (-'hi. Kanchana R. Ravichandran, Allan B. Zong, Alexander T. Taguchi, Daniel G. Nocera, JoAnne Stubbe, and Cecilia Tommos . Article Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. and Q Electron Paramagnetic Resonance Studies of Zinc-Substituted Reaction Centers from Rhodopseudomonasviridis. Ferredoxin (FD) (E’ = – 430 mV): Using several experiments, including electron paramagnetic resonance (EPR), they were led to believe that pheophytin was reducible and therefore potentially the primary electron acceptor between P680 and plastoquinone. Answer. Due to the higher midpoint potential of plastoquinone in the Q A site than Pheo − the charge-separated state is stabilized, reducing the probability of a back reaction between Q A − and P680 + . primary electron acceptor of Photosystem II (PS II) taking electrons from the excited primary electron donor, chlorophyll P680, is a special form of bound plastoquinone (referred to as Q; also known as QA) with redox potential of −130 mV; its one-electron re-duction is accompanied by characteristic absorbance Phosphatidylglycerol Requirement for the Function of Electron Acceptor Plastoquinone Q B in the Photosystem II Reaction Center † Biochemistry, 2002 Gombos Zoltan It transports the protons to the lumen of thylakoid discs, while the electrons continue through the electron transport chain into the cytochrome b 6 f protein complex. A) Phaeophytin is the primary electron acceptor of PS II. Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Abbre6iations – BBY particles: Berthold-Babcock-Yocum PSII particles; Chl: chlorophyll; PSII: photosystem II; Q A: the primary plastoquinone electron acceptor of photosystem II; Q B: the secondary plastoquinone electron acceptor of photosystem II. PCC 6803 strain carrying mutations in the D2 protein. The Journal of Physical Chemistry Letters. The results show that a complex of plastoquinone and Fe can act as the stable “primary” electron acceptor in photosystem II reaction centers and that the interaction of its singly reduced form with the reduced intermediary acceptor, Pheo [unk], is responsible for the EPR doublet. 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