Psae
Mostrando 1-12 de 21 artigos, teses e dissertações.
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1. Fatores associados ao abandono escolar no ensino médio público de Minas Gerais
Este artigo tem como objetivo apontar quais são os principais fatores que influenciam o abandono escolar no ensino médio. Os dados utilizados baseiam-se em uma série histórica construída a partir do levantamento das Pesquisas Nacionais por Amostra de Domicílios (PNAD) e numa ampla pesquisa realizada no estado de Minas Gerais (MG), a qual culminou na co
Educ. Pesqui.. Publicado em: 2015-09
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2. Regulation of psbA and psaE Expression by Light Quality in Synechocystis Species PCC 6803. A Redox Control Mechanism
We investigated the influence of light of different wavelengths on the expression of the psbA gene, which encodes the D1 protein of the photosystem II and the psaE gene, which encodes the subunit Psa-E of the photosystem I, in Synechocystis sp PCC 6803. In an attempt to differentiate between a light-sensory and a redox-sensory signaling processes, the
American Society of Plant Physiologists.
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3. Identification of surface-exposed domains on the reducing side of photosystem I.
Photosystem I (PSI) is a multisubunit enzyme that catalyzes the light-driven oxidation of plastocyanin or cytochrome c6 and the concomitant photoreduction of ferredoxin or flavodoxin. To identify the surface-exposed domains in PSI of the cyanobacterium Synechocystis sp. PCC 6803, we mapped the regions in PsaE, PsaD, and PsaF that are accessible to proteases
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4. PsaE Is Required for in Vivo Cyclic Electron Flow around Photosystem I in the Cyanobacterium Synechococcus sp. PCC 7002.
Electron transfer rates to P700+ have been determined in wild-type and three interposon mutants (psaE-, ndhF-, and psaE- ndhF-) of Synechococcus sp. PCC 7002. All three mutants grew significantly more slowly than wild type at low light intensities, and each failed to grow photoheterotrophically in the presence of 3-(3,4-dichlorophenyl)-1,1-dimethylurea (DCMU
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5. Molecular heterogeneity of photosystem I. psaD, psaE, psaF, psaH, and psaL are all present in isoforms in Nicotiana spp.
The protein composition of photosystem I (PSI) was examined in Nicotiana spp. by high-resolution polyacrylamide gel electrophoresis, N-terminal amino acid sequencing, and immunoblot analysis. Five PSI proteins show polymorphism in an amphidiploid species, Nicotiana tabacum, but not in its ancestral diploid species, Nicotiana sylvestris and Nicotiana tomentos
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6. Organization of photosystem I polypeptides examined by chemical cross-linking.
Photosystem I from the cyanobacterium Synechocystis sp. PCC 6803 was examined using the chemical cross-linkers glutaraldehyde and N-ethyl-1-3-[3-(dimethylamino)propyl]carbodiimide to investigate the organization of the polypeptide subunits. Thylakoid membranes and photosystem I, which was isolated by Triton X-100 fractionation, were treated with cross-linkin
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7. Nucleotide sequence of the psaE gene of cyanobacterium Synechococcus sp. PCC 6301.
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8. Yersinia pestis pH 6 antigen: genetic, biochemical, and virulence characterization of a protein involved in the pathogenesis of bubonic plague.
We studied a protein antigen, designated pH 6 Ag, that has the same regulation of expression as the previously described Yersinia pestis pH 6 Ag. Monospecific antiserum to this antigen recognized several proteins, ranging from 15 to over 75 kilodaltons (kDa), which were strongly expressed when Y. pestis was cultivated at 37 degrees C and pH 6 but were expres
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9. Characterization of Two Photosynthetic Mutants of Maize1
We describe here the biochemical characteristics of the hcf44 and hcf47 (high chlorophyll fluorescence) mutants of maize (Zea mays L.). Both mutants were sensitive to high light intensities, exhibiting reduced growth and fluorescence intensity. Electron transport through the mutants' photosystem (PS) I and PSII reaction centers was reduced and NADP+ photored
American Society of Plant Physiologists.
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10. Organization of Photosystem I Polypeptides (A Structural Interaction between the PsaD and PsaL Subunits).
The wild-type, PsaD-less, and PsaL-less strains of the cyanobacterium Synechocystis sp. PCC 6803 were used to study subunit interactions in photosystem I (PSI). When the membranes of a PsaD-less strain were solubilized with Triton X-100 and PSI was purified using ion-exchange chromatography and sucrose-gradient ultracentrifugation, the PsaL subunit was subst
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11. Redox Control of psbA Gene Expression in the Cyanobacterium Synechocystis PCC 6803. Involvement of the Cytochrome b6/f Complex
We investigated the role of the redox state of the photosynthetic and respiratory electron transport chains on the regulation of psbA expression in Synechocystis PCC 6803. Different means to modify the redox state of the electron carriers were used: (a) dark to oxidize the whole electron transport chain; (b) a shift from dark to light to induce its reduction
American Society of Plant Physiologists.
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12. Transcriptional analysis of the Yersinia pestis pH 6 antigen gene.
The pH 6 antigen of Yersinia pestis is a virulence protein whose gene, psaA, is positively regulated at the transcriptional level by low pH, mammalian temperature, and an upstream locus, psaE. Low pH appears to be required for initial psaA transcription, although increased temperature is necessary for full expression of the gene. In addition, psaA is monocis