Repression Of Structures
Mostrando 1-12 de 88 artigos, teses e dissertações.
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1. Análise da capacidade de carga de fundação por sapatas executadas na cidade de São Caetano do Sul/SP / Bearing capacity analysis of shallow foundation in São Caetano do Sul city
Este trabalho teve o objetivo estudar às formulações e teorias de capacidade de carga e previsão de recalques para o caso de uma solução em fundação superficial adotado em uma obra de um edifício comercial de 10 pavimentos e 3 subsolos localizado na cidade de São Caetano do Sul/SP, por meio de análise de quatro provas de carga sobre placa. Para ta
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2012
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2. Quantification of microRNAs in the central nervous system : implications / Quantificação de diferentes microRNAs no sistema nervoso central : implicações nos mecanismos de desenvolvimento e processos fisiopatologicos
MicroRNAs are a new class of small RNA molecules (21-24 nucleotide-long) that negatively regulate gene expression either by translational repression or target mRNA degradation. It is believed that about 30% of all human genes are targeted by these molecules. MiRNAs are involved in many important biological processes including cell differentiation, embryonic
Publicado em: 2010
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3. Active repression of RAR signaling is required for head formation
The retinoic acid receptors (RARs) recruit coactivator and corepressor proteins to activate or repress the transcription of target genes depending on the presence of retinoic acid (RA). Despite a detailed molecular understanding of how corepressor complexes function, there is no in vivo evidence to support a necessary function for RAR-mediated repression. Si
Cold Spring Harbor Laboratory Press.
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4. The Drosophila Polycomb Protein Interacts with Nucleosomal Core Particles In Vitro via Its Repression Domain
The proteins of the Polycomb group (PcG) are required for maintaining regulator genes, such as the homeotic selectors, stably and heritably repressed in appropriate developmental domains. It has been suggested that PcG proteins silence genes by creating higher-order chromatin structures at their chromosomal targets, thus preventing the interaction of compone
American Society for Microbiology.
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5. Polycomb repression of flowering during early plant development
All plants flower late in their life cycle. For example, in Arabidopsis, the shoot undergoes a transition and produces reproductive flowers after the adult phase of vegetative growth. Much is known about genetic and environmental processes that control flowering time in mature plants. However, little is understood about the mechanisms that prevent plants fro
The National Academy of Sciences.
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6. Repression of IS200 transposase synthesis by RNA secondary structures.
The IS 200 transposase, a 16 kDa polypeptide encoded by the single open reading frame (ORF) of the insertion element, has been identified using an expression system based on T7 RNA polymerase. In wild-type IS 200, two sets of internal inverted repeats that generate RNA secondary structures provide two independent mechanisms for repression of transposase synt
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7. Distinct Mechanisms for Repression of RNA Polymerase III Transcription by the Retinoblastoma Tumor Suppressor Protein
The retinoblastoma (RB) protein represses global RNA polymerase III transcription of genes that encode nontranslated RNAs, potentially to control cell growth. However, RNA polymerase III-transcribed genes exhibit diverse promoter structures and factor requirements for transcription, and a universal mechanism explaining global repression is uncertain. We show
American Society for Microbiology.
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8. Characterization of Insoluble Protein Fractions of Mitochondria from Saccharomyces cerevisiae
Saccharomyces cerevisiae was grown in a chemostat in the presence of excess oxygen. Cells harvested from fully derepressed and strongly repressed steady states show typical promitochondria-like structures under conditions of strong repression. Insoluble membrane proteins were extracted from highly purified mitochondria and submitted to isoelectric focusing i
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9. Induction Specificity and Catabolite Repression of the Early Enzymes in Camphor Degradation by Pseudomonas putida
The ability of bornane and substituted bornanes to induce the early enzymes for d(+)-camphor degradation and control of these enzymes by catabolite repression were studied in a strain of a Pseudomonas putida. Bornane and 20 substituted bornane compounds showed induction. Of these 21 compounds, bornane and 8 of the substituted bornanes provided induction with
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10. Effect of 3':5'-cyclic GMP derivatives on the formation of Caulobacter surface structures.
Exogenous derivatives of 3':5'-cyclic GMP, 8-bromo- and N2,O2'-dibutyryl cyclic GMP, coordinately repress surface structure differentiation in Caulobacter crescentus. Growth in the presence of cyclic GMP derivatives resulted in the loss of flagella and pili formation and concomitant resistance to both DNA phage phiCbK and RNA phage phiCb5 infection without a
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11. Transcriptional activation and repression by Fos are independent functions: the C terminus represses immediate-early gene expression via CArG elements.
The Fos-Jun complex has been shown to activate transcription through the regulatory element known as the AP-1 binding site. We show that Fos down regulates several immediate-early genes (c-fos, Egr-1, and Egr-2) after mitogenic stimulation. Specifically, we demonstrate that the target for this repression is a sequence of the form CC(A/T)6GG, also known as a
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12. GalR mutants defective in repressosome formation
Transcription repression of the galactose operon of Escherichia coli requires (1) the binding of the GalR repressor to tandem operators flanking the promoters, (2) the binding of histone-like protein, HU, to a site between the GalR-binding sites, and (3) negatively supercoiled DNA. Under these conditions, protein–protein interactions mediate the formation
Cold Spring Harbor Laboratory Press.