Molecular interactions of the three plastoquinone electron acceptors, QA, QB, and QC, in
photosystem II (PSII) were studied by fragment molecular orbital (FMO) calculations …

The redox potentials Em (QA/QA−) of the primary quinone electron acceptor QA in oxygen-
evolving photosystem II complexes of three species were determined by …

The redox potential of QA in photosystem II (PSII) is known to be lower by∼ 100 mV in the
presence of phenolic herbicides compared with the presence of DCMU-type herbicides. In …

Redox titrations of QA, the first quinone electron acceptor, have been performed on
Photosystem II (PS II) membranes which were either active or inactive in terms of oxygen …

Many inhibitors prevent the oxidation of the primary electron-accepting quinone (QA) by the
secondary quinone (Qв) in photosystem II by displacement of Qв from its binding site. On the …

In order to gain more information about the binding and interaction of quinones acting as
electron acceptors in photosynthetic reaction centers, infrared spectra of 'model” quinones …

The redox potential of QA in Photosystem II (PSII) from Thermosynechococcus elongatus
was titrated monitoring chlorophyll fluorescence. A high potential form (Em=+ 60±25mV) …

Interactions of the primary quinone acceptor QA of photosystem II (PS II) with surrounding
amino acid residues were studied by analysis of FTIR difference spectra of QA upon its …

Here we show that herbicide binding influences the redox potential (Em) of the
plastoquinone QA/QA-redox couple in Photosystem II (PSII). Phenolic herbicides lower the …

The effects of H-bonding on the redox potential and molecular vibrations of plastoquinone
(PQ) that functions as a primary and a secondary quinone electron acceptor (QA and QB …