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Showing 1 to 20 of 100 for “"Photosystem II"”.
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Modifikationen am Photosystem II-Reaktionszentrum
… ist, eine Methode des Pigmentaustauschs am Photosystem II Reaktionszentrum zu optimieren. Es konnten eine Reihe von Chorophyll-ähnlichen Pigmenten in das RC integriert werden. Dabei wurde ein Chlorophyll a (Chl) gegen ein [Ni2+]-Chlorophyll a (Ni-Chl), ein [3-Acetyl]-chlorophyll a (Ac-Chl) …
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Photosystem Ii Reactions in Thylakoid Membranes
Made available in DSpace on 2015-05-14T14:57:43Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7514197.PDF: 5579041 bytes, checksum: 153945dd69eae589d5a9fcc6dcac3150 (MD5) Previous issue date: 1975
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Studies on photosystem II in higher plant chloroplasts
… using chloroplasts and isolated 0 2—evolving PSII preparations. Both energy transfer and molecular aspects of P511 have been investigated. The initial reactions of energy transfer that occur within the first few nanoseconds of excitation were measured by time resolved fluorescence using the …
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Photosystem Ii Charge Stabilization Reactions in Isolated Chloroplasts
Made available in DSpace on 2014-12-14T05:40:42Z (GMT). No. of bitstreams: 1 7726686.pdf: 6407742 bytes, checksum: 2794fefbc26c16858cd64d6171607e40 (MD5) Previous issue date: 1977
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Functional studies on the extrinsic proteins of Photosystem II
… both the reducing-side and oxidizing-side of Photosystem II are significantly altered. Using the psbo1 mutant plant as a transgenic host, two plant lines were produced, which contained an N-terminally His6-tagged PsbO-1 protein. Photosystem II closure kinetics demonstrated that the defective …
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Fluorescence Studies of Photosystem II Fluorescence Quenching During Desiccation
… largely unclear. In the lichen Parmelia sulcata, photosystem protection has been associated with an energy quenching energetically coupled to PSII and characterized by a fast-fluorescence decay lifetime, and long-wavelength emission. The present study compares the relative ability of green algae …
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Investigation of photoprotection of photosystem II by cytochrome b559
… capacity of a plant can impair the ability of photosystem II to evolve oxygen and can ultimately lead to degradation of proteins within the reaction center. Photoinhibitory reactions caused by ultraviolet B radiation (280-320 nm) are of particular concern since decreased stratospheric ozone is …
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Observation and characterization of inactive photosystem II reaction centers
Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:43:31Z Item is restricted indefinitely.
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Action of Allelochemicals on Algal Growth and Photosystem Ii Efficiency
… was tested on unicellular algal growth and photosystem II (PSII) efficiency. Chlorella pyrenoidosa Chick and Selenastrum capricornutum Printz were the bioassay species. Fourteen of the 15 allelochemicals investigated resulted in a significant decrease in C. pyrenoidosa growth; 7 caused more …
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Towards reverse engineering of Photosystem II: Synergistic Computational and Experimental Approaches
ABSTRACT Photosystem II (PSII) of oxygenic photosynthesis has the unique ability to photochemically oxidize water, extracting electrons from water to result in the evolution of oxygen gas while depositing these electrons to the rest of the photosynthetic machinery which in turn reduces CO2 to …
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Bicarbonate Reversible Anionic Inhibition of the Quinone Reductase in Photosystem II
… action was located on the acceptor side of photosystem II (PS II). The oxidation of Q$\sb{\rm A}\sp-$ (the primary quinone acceptor of PS II) by Q$\sb{\rm B}$ or Q$\sb{\rm B}\sp-$ (Q$\sb{\rm B}$ is the secondary quinone acceptor of PS II) exhibited a smaller overall half-time at pH 7.5 than …
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The Evolution of Photosystem II Subunit S across the Green Lineage
… of fast-inducing energy-dependent NPQ is the Photosystem II subunit S protein (PsbS), which is activated in response to high light and interacts with photosystem II to cause quenching. Algae and moss, however, are thought to predominantly use another protein to regulate NPQ, the Light …
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Role of Bicarbonate and of Manganese in Photosystem Ii Reactions of Photosynthesis
… examines some of the reactions associated with Photosystem II. On the reducing side of Photosystem II, the role of bicarbonate ion on electron transport from Photosystem II to Photosystem I was established and on the oxidizing side studies were carried out to examine the involvement of manganese …
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The Mechanism of Chloride Activation of Oxygen Evolution in Spinach Photosystem Ii
… activates the oxygen-evolving complex (OEC) of Photosystem II (PS II) was studied by $\sp{35}{\rm Cl}$-NMR and steady-state measurements of oxygen evolution. This study represents the first attempt to directly monitor ${\rm Cl}\sp-$ binding in spinach. At low light intensity, the ${\rm Cl}\sp-$ …
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Proteomics Assisted Discovery Of Novel Proteins In Assembly And Regulation Of Photosystem II
… under 33 different environmental conditions. Photosystem II: PSII) is a large membrane protein complex that performs the water oxidation reactions of the photosynthetic electron transport chain in cyanobacteria, algae, and plants. Subsequently, we also performed an accurate mass tag: AMT) …
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The Mechanism of Bicarbonate Activation of Plastoquinone Reduction in Photosystem II of Photosynthesis
Bicarbonate (HCO$\sb{3}\sp{-}$) is required for photosystem II (PS II) electron transport. Depleting thylakoids of HCO$\sb{3}\sp{-}$ slows down electron transfer from the primary quinone acceptor Q$\sb{\rm A}$ to the secondary quinone acceptor Q$\sb{\rm B}$. It also blocks electron transfer from …
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Integrating photosystem II and electroactive bacteria with three-dimensional electrodes for semi-artificial photosynthesis
… for protein film-photoelectrochemistry with photosystem II. The relationships of IO-ITO electrode structure and photosystem II activity were discussed following a combination of microscopic, spectroscopic and photoelectrochemical characterisations. Chapter 4 reports an inverse opal-graphene …
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Experimental and theoretical studies of the photosystem II reaction center: Implications for bicarbonate binding and function
… arginine residues in bicarbonate binding in the photosystem II (PSII) reaction center, arginines 257 and 269 of the D1 polypeptide (D1-R257 and D1-R269) near the putative bicarbonate binding sites, the non-heme iron and the Q$\sb{\rm B}$ binding niche, were mutated in a unicellular green alga …
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