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PDF 1D and 2D ESEEM Study of the Semiquinone Radical Q

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The electronic structure of the neutral isoalloxazine semiquinone within Anabaena flavodoxin: New insights from HYSCORE experimen

1 dimensional 3 pulse ESEEM (1d 3p ESEEM) experiments (see Supplementary data), the previously described method was used [15]. Simulation of HYSCORE spectra was achieved by using a com-puter program developed in our laboratory [20]. ...

Electronic Structure Studies of the Spin Density Distribution of the Q A Plastosemiquinone Free Radical of Photosystem

... 1D-and 2D-ESEEM Study of the Semiquinone Radical Q(A)(−) of Photosystem II. Journal of the American ... (2013) Electronic Structure Studies of the Spin Density Distribution of the Q A Plastosemiquinone Free Radical of Photosystem II. In and DOI ...

Reaction of Superoxide Radical with Quinone Molecules - Europe PMC Article - Europe P

For quinones with no or short hydrophobic tails, the radical product is a semiquinone at much lower yield, likely indicating reduction of quinone by superoxide, and loss of most of the semiquinone product by disproportionation. In the presence of ubiquinone-10, a ...

Radicals and Radical Pairs in Photosynthesis .

Radicals and Radical Pairs in Photosynthesis Angerhofer ... 2D ESEEM of the 15 N‐labeled radical cation of bacteriochlo‐rophyll a and of the primary donor in reaction centers of Rhodobacter sphaeroides ... 3 mm high‐field EPR on semiquinone radical anions Q ‐ related to photosynthesis and on the primary donor P + and acceptor Q A ‐ in ...

One- and Two-Dimensional ESEEM Spectroscopy of Flavoprotei

pulse (4P) 1D-ESEEM and 2D-HYSCORE techniques. To our knowledge this is the first report on a flavoprotein semiquinone HYSCORE study. We show that 1D-ESEEM ...

(PDF) 1D- and 2D-ESEEM Study of the Semiquinone Radical Q A - of Photosystem II | Yiannis Deligiannakis - Academia.e

1D- and 2D-ESEEM Study of the Semiquinone Radical Q A - of Photosystem II Journal of the American Chemical Society, 1999 Y. Deligiannakis Download with Google Download with Facebook ...

THE BINDING POCKETS OF QA AND Q IN THE PHOTOSYNTHETIC REACTION CENTER OF RBA. SPHAEROIDES PROBED BY PULSED E

1D 3-pulse ESEEM of the M265IT Q A Semiquinone ..131 2D HYSCORE of the M265IT Q A Semiquinone .132 ... 2D HYSCORE of the M265IT Q A Semiquinone .132 Analysis of the NQIAnalysis of the HFI Molecular Dynamics Investigation of M265IT Mutant ...

Asymmetric Binding of the High-Affinity QH Ubisemiquinone in Quinol Oxidase bo Escherichia coli Studied by Multifrequency Electron Paramagnetic .

that the QH site stabilizes a semiquinone radical anion (11, 12). Direct evidence of a specific interaction of QH ¥-with ... successfully used to study the binding of QA and QB in their different redox states as well as the distribution of the spin density on both ...

Effect of pH on the semiquinone radical QA− in CN-treated photosystem II: study by hyperfine sublevel correlation spectroscopy - ScienceDire

The semiquinone radical Q A − has been studied by electron spin echo envelope modulation (ESEEM) spectroscopy in Photosystem II membranes treated with CN ...

Hydrogen bonds between nitrogen donors and the semiquinone .

Photosynthetic reaction centers from Rhodobacter sphaeroides have identical ubiquinone-10 molecules functioning as primary (Q A) and secondary (Q B) electron acceptors.X-band 2D pulsed EPR spectroscopy, called HYSCORE, was applied to study the interaction of the Q B site semiquinone with nitrogens from the local protein environment in natural and 15 N uniformly labeled reactions centers.

ENDOR spectroscopic studies of stable semiquinone radicals bound to the Escherichia coli cytochrome bo3 quinol oxidase - Hastings - 2000 .

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In Situ Monitoring Potential-Dependent Electrochemical Process by Liquid NMR Spectroelectrochemical Determination: A Proof-of- Concept Stu

NMR spectra recorded around the first and the second oxidation waves (Oxid I and Oxid II) experienced the signal decreasing at 6.73 ppm and the followed signal recovering at 6.90 ppm, indicating the generation of semiquinone radical and the further oxidation to ...

2D-Hyperfine sublevel correlation spectroscopy of tyrosyl radicals | Y Deligiannakis | Request P

Request PDF on ResearchGate | 2D-Hyperfine sublevel correlation spectroscopy of tyrosyl radicals | Hyperfine sublevel correlation (HYSCORE) spectroscopy has been used to study the tyrosyl radicals in Photosystem II and bovine liver catalase. The HYSCORE ...

Publications Authored by Rimma I Samoilova | PubFac

Are you Rimma I Samoilova? Register this Author 34Publications 168Reads 20Profile Views Correction to The Semiquinone at the Q(i) Site of the bc1 Complex Explored Using HYSCORE Spectroscopy and Specific Isotopic Labeling of Ubiquinone in ...

A study of the exchangeable protons in the Q A site of .

Deligiannakis Y, Hanley J, Rutherford AW 1999 1D- and 2D-ESEEM study of the semiquinone radical QA- of photosystem II J Am Chem Soc 12176537664 Crossref, Google Scholar; Dasgupta J, Ananyev G, Dismukes G Photoassembly of the Water-oxidizing Complex in Photosystem II Coordination Chemistry Reviews 2523–4 2008 34760Web Crossref Medline, Google ...

Hydrogen bonding and spin density distribution in the QB semiquinone of bacterial reaction centers and comparison with the QA si

Hydrogen bonding and spin density distribution in the Q B semiquinone of bacterial reaction centers and comparison with the Q ... and the spectra obtained can be considered to be powder-type 1D or 2D ESEEM spectra because the resulting pattern contains ...

Radicals and Radical Pairs in Photosynthesis, Photochemistry & Photobiology | 10.1111/j.1751-1097.1996.tb02989.x | DeepDy

Read "Radicals and Radical Pairs in Photosynthesis, Photochemistry & Photobiology" on DeepDyve, ... 3 mm high‐field EPR on semiquinone radical anions Q ‐ related to photosynthesis and on the primary donor P + and acceptor Q A ‐ in reaction centers of ...

fine and Quadrupole Tensor Characterization of the Nitrogen Hydrogen Bond Donors to the Semiquinone of the Q Site Band N ESEEM and DFT Stu

Nitrogen Hydrogen Bond Donors to the Semiquinone of the Q B Site in Bacterial Reaction Centers: A Combined X- and S‑Band 14,15N ... conjunction with previously reported X-band 14,15N 1D and 2D ESEEM spectra. Simulations of X- and S-band spectra B δ ...

Hydrogen bonds between nitrogen donors and the semiquinone in the QB-site of bacterial reaction... - Europe PMC Article - Europe PubMed Centr

X-band 2D pulsed EPR spectroscopy, called HYSCORE, was applied to study the interaction of the Q B site semiquinone with nitrogens from the local protein environment in natural and 15 N uniformly labeled reactions centers. ...

Yiannis Deligiannakis, Proffessor - Παραθέσεις Μελετητή Goog

1D- and 2D-ESEEM Study of the Semiquinone Radical Q A-of Photosystem II Y Deligiannakis, J Hanley, AW Rutherford Journal of the American Chemical Society 121 (33), 7653-7664 , 1999

Determination of the Complete Spin Density Distribution in 13C-Labeled Protein-Bound Radical Intermediates Using Advanced 2D Electron Paramagnetic .

Determining the complete electron spin density distribution for protein-bound radicals, even with advanced pulsed electron paramagnetic resonance (EPR) methods, is a formidable task. Here we present a strategy to overcome this problem combining multifrequency ...