2d Frames
Mostrando 13-24 de 343 artigos, teses e dissertações.
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13. Isolamento, caracterização e regulação de genes que codificam pectato liase em Crinipellis perniciosa, agente etiológico da vassoura-de-bruxa do cacaueiro (Theobroma cacao) / Isolation, characterization and regulation of genes encoding pectate lyase in Crinipellis perniciosa, etiological agent of the witches broom in cocoa (Theobroma cacao)
In this work, genes encoding the pectinolytic enzyme pectate lyase were isolated from the genome of the fungus Crinipellis perniciosa, etiological agent of the witches broom disease of cocoa. Pectinolytic enzymes have been correlated with the pathogenicity of some phytopathogenic fungi. Preliminary database searches of the Genome Project Witches broom, revea
Publicado em: 2006
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14. AvaliaÃÃo experimental de detecÃÃo de colisÃo para jogos J2ME
Despite Experimental evaluation is an accepted and widespread approach for scientific validation in most scientific disciplines, only recently it has been systematically used in Software Engineering, with the objective to experimentally examine development approaches. In this scenario, there has been a growing demand for research in the area of Empirical Sof
Publicado em: 2005
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15. Sequencing and promoter analysis of the nifENXorf3orf5fdxAnifQ operon from Azospirillum brasilense Sp7
A 40-kb DNA region containing the major cluster of nif genes has been isolated from the Azospirillum brasilense Sp7 genome. In this region three nif operons have been identified: nifHDKorf1Y, nifENXorf3orf5fdxAnifQ and orf2nifUSVorf4. The operons containing nifENX and nifUSV genes are separated from the structural nifHDKorf1Y operon by about 5 kb and 10 kb,
Brazilian Journal of Medical and Biological Research. Publicado em: 2001-11
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16. Estudo do comportamento mecanico de comandos desbalanceados pelo metodo de elementos finitos
The work treats the finite element modeling of the static behaviour of drillstrings equiped with bottom hole assemblies composed by unbalanced drill collars. The drillstring was discretized in beam-column elements having geometric non linearity. The Newton-Raphson Method with an incremental loading scheme was used to obtain the solution of the non linear sys
Publicado em: 1996
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17. Developmental rearrangement of cyanobacterial nif genes: nucleotide sequence, open reading frames, and cytochrome P-450 homology of the Anabaena sp. strain PCC 7120 nifD element.
An 11-kbp DNA element of unknown function interrupts the nifD gene in vegetative cells of Anabaena sp. strain PCC 7120. In developing heterocysts the nifD element excises from the chromosome via site-specific recombination between short repeat sequences that flank the element. The nucleotide sequence of the nifH-proximal half of the element was determined to
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18. Relationships among the rfb regions of Salmonella serovars A, B, and D.
The O antigens of Salmonella serogroups A, B, and D differ structurally in their side chain sugar residues. The genes encoding O-antigen biosynthesis are clustered in the rfb operon. The gene rfbJ in strain LT2 (serovar typhimurium, group B) and the genes rfbS and rfbE in strain Ty2 (serovar typhi, group D) account for the known differences in the rfb gene c
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19. Cloning and sequencing of a putative Escherichia coli [NiFe] hydrogenase-1 operon containing six open reading frames.
DNA encompassing the structural genes of an Escherichia coli [NiFe] hydrogenase has been cloned and sequenced. The genes were identified as those encoding the large and small subunits of hydrogenase isozyme 1 based on NH2-terminal sequences of purified subunits (kindly provided by K. Francis and K. T. Shanmugam). The structural genes formed part of a putativ
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20. Discrete high molecular weight RNA transcribed from the long interspersed repetitive element L1Md.
The repetitive element LINE (L1) previously has been shown to contain two long open reading frames which are overlapping and out-of-frame similar to those found in retroviruses (1). In rodents and in human cells, these repeats appear to be transcribed into a heterogeneous population of RNAs in most cell types (2,3,4). No discrete transcript has been reported
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21. Reconstruction of the yeast 2 micron plasmid partitioning mechanism.
The effect of the yeast 2 micron circle encoded REP1 and REP2 gene products on plasmid partitioning and copy number control was analyzed by removing the open reading frames from their normal sequence context and transcriptional control regions and directing their expression using heterologous promoters in [cir0] host strains. Both the REP1 and REP2 gene prod
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22. Analysis and comparison of nucleotide sequences encoding the genes for [NiFe] and [NiFeSe] hydrogenases from Desulfovibrio gigas and Desulfovibrio baculatus.
The nucleotide sequences encoding the [NiFe] hydrogenase from Desulfovibrio gigas and the [NiFeSe] hydrogenase from Desulfovibrio baculatus (N.K. Menon, H.D. Peck, Jr., J. LeGall, and A.E. Przybyla, J. Bacteriol. 169:5401-5407, 1987; C. Li, H.D. Peck, Jr., J. LeGall, and A.E. Przybyla, DNA 6:539-551, 1987) were analyzed by the codon usage method of Staden an
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23. Mammalian ets-1 and ets-2 genes encode highly conserved proteins.
Cellular ets sequences homologous to v-ets of the avian leukemia virus E26 are highly conserved. In mammals the ets sequences are dispersed on two separate chromosomal loci, called ets-1 and ets-2. To determine the structure of these two genes and identify the open reading frames that code for the putative proteins, we have sequenced human ets-1 cDNAs and et
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24. Molecular characterization of the virD operon from Agrobacterium tumefaciens.
The Agrobacterium tumefaciens Ti plasmid virulence (vir) region contains at least six transcriptional units required for the efficient transfer of T-DNA to the plant genome (virA, B, C, D, E, and G). We have reported that two proteins encoded by the 5'portion of the virD operon are required for a site-specific endonuclease activity that nicks the direct repe