Macwilliams
Mostrando 1-5 de 5 artigos, teses e dissertações.
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1. Identidades de MacWilliams para métricas Poset-Block / MacWilliams identity for Poset-Block metrics
Em 1963, F. J. MacWilliams desenvolveu as chamadas identidades de MacWilliams, que estabelecem, em particular, relações entre a distribuição de pesos de códigos possuindo alta taxa de informação e códigos com baixa dimensão. Consideramos neste trabalho a família de métricas poset-block, uma pouco explorada generalização tanto das métricas de bl
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/09/2011
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2. Direct genetic selection for a specific RNA-protein interaction.
The decision between lytic and lysogenic development of temperate DNA bacteriophages is determined largely by transcriptional regulation through DNA-binding proteins. To determine whether a heterologous RNA-binding activity could control the developmental fate of a DNA bacteriophage, a derivative of P22 was constructed in which the chosen developmental pathw
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3. Genetic Analysis of the Bacteriophage λ Attl Nucleoprotein Complex
Site-specific recombination in bacteriophage λ involves interactions among proteins required for integration and excision of DNA molecules. We have analyzed the elements required to form an in vivo nucleoprotein complex of integrase (Int) and integration host factor (IHF). Interaction of Int with the core (the site of strand exchange) is stabilized by the f
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4. Generation of new DNA binding specificity by truncation of the type IC EcoDXXI hsdS gene.
The hsdS subunit of a type IC restriction-modification enzyme is responsible for the enzyme's DNA binding specificity. Type I recognition sites are characterized by two defined half-sites separated by a non-specific spacer of defined length. The hsdS subunit contains two independent DNA binding domains, each targeted towards one DNA half-site. We have shown
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5. Mutational analysis of protein binding sites involved in formation of the bacteriophage lambda attL complex.
Bacteriophage lambda site-specific recombination requires the formation of higher-order protein-DNA complexes to accomplish synapsis of the partner attachment (att) sites as well as for the regulation of the integration and excision reactions. The att sites are composed of a core region, the actual site of strand exchange, and flanking arm regions. The attL