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Effects of Iron Limitation on Photosystem II Composition and Light Utilization in Dunaliella tertiolecta
The effects of iron limitation on photosystem II (PSII) composition and photochemical energy conversion efficiency were studied in the unicellular chlorophyte alga Dunaliella tertiolecta. The quantumExpand
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Recruitment of a foreign quinone into the A(1) site of photosystem I. I. Genetic and physiological characterization of phylloquinone biosynthetic pathway mutants in Synechocystis sp. pcc 6803.
Genes encoding enzymes of the biosynthetic pathway leading to phylloquinone, the secondary electron acceptor of photosystem (PS) I, were identified in Synechocystis sp. PCC 6803 by comparison withExpand
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Iron-sulfur clusters in type I reaction centers.
Type I reaction centers (RCs) are multisubunit chlorophyll-protein complexes that function in photosynthetic organisms to convert photons to Gibbs free energy. The unique feature of Type I RCs is theExpand
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Near-IR absorbance changes and electrogenic reactions in the microsecond-to-second time domain in Photosystem I.
The back-reaction kinetics in Photosystem I (PS I) were studied on the microsecond-to-s time scale in cyanobacterial preparations, which differed in the number of iron-sulfur clusters to assess theExpand
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Modeling of the P700+ charge recombination kinetics with phylloquinone and plastoquinone-9 in the A1 site of photosystem I.
Light activation of photosystem I (PS I) induces electron transfer from the excited primary electron donor P700 (a special pair of chlorophyll a/a' molecules) to three iron-sulfur clusters, F(X),Expand
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Photosystem I Is Indispensable for Photoautotrophic Growth, CO2 Fixation, and H2 Photoproduction inChlamydomonas reinhardtii *
Certain Chlamydomonas reinhardtiimutants deficient in photosystem I due to defects in psaAmRNA maturation have been reported to be capable of CO2fixation, H2 photoevolution, and photoautotrophicExpand
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Role of D1-His190 in proton-coupled electron transfer reactions in photosystem II: a chemical complementation study.
Recent models for water oxidation in photosystem II propose that His190 of the D1 polypeptide facilitates electron transfer from tyrosine YZ to P680+ by accepting the hydroxyl proton from YZ. To testExpand
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Strains of Synechocystis sp. PCC 6803 with Altered PsaC
Two [4Fe-4S] clusters, FA and FB, function as terminal electron carriers in Photosystem I (PS I), a thylakoid membrane-bound protein-pigment complex. To probe the function of these two clusters inExpand
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Role of D1-His190 in the proton-coupled oxidation of tyrosine YZ in manganese-depleted photosystem II.
To further characterize the role of D1-His190 in the oxidation of tyrosine Y(Z) in photosystem II, the pH dependence of P(680)(*)()(+) reduction was measured in H190A and Mn-depleted wild-type PSIIExpand
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Recruitment of a Foreign Quinone into the A1 Site of Photosystem I
Interruption of the menAor menB gene in Synechocystis sp. PCC 6803 results in the incorporation of a foreign quinone, termed Q, into the A1 site of photosystem I with a number of experimentalExpand
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