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Resultados 1 - 17 de 17
13.

Etiology and immunology of infectious bronchitis virus

Caron, LF.
R. bras. Ci. avíc.; 12(2)2010.
Artigo em Inglês | VETINDEX | ID: vti-717913
17.

65 kDa similar ao isolado selvagem, que pode ser a responsável pela sua ação inseticida. Os resultados obtidos demonstram a possibilidade de efetuar melhoramento genético em B. thuringiensis por meio de mutagênese mediada por transposon e abre caminho para o estudo das vias metabólicas envolvidas na produção de proteínas Cry / Obtenção de mutantes de Bacillus thuringiensis por inserção do transposon Tn-5 e avaliação da toxicidade frente a larvas de Spodoptera frugiperda / Bacillus is a gram-positive bacterium and produces internal crystal inclusions named crystal (Cry) proteins or d - endotoxins during the sporulation phase. These proteins as used to control several agriculture insect pests. However little is known concerning the metabolic pathways involved in the production of these proteins. For example, in nature, it is possible to find isolates that produce large quantities of the Cry proteins as well as it is possible to find ones that produce limited quantities. Since such difference might be related to gene regulation the identification of regulation factors found in these isolated should lead to an increment on the crystal protein production found in isolated naturally exhibiting lower production. In this work, ten mutant clones were analyzed compared to the wild type (Bt1) with respect to Spodoptera frugiperda neonatal larvae mortality considering also the amount of crystal protein produced by these mutants. The results have demonstrated that two mutant clones named B9 and E2 have produced strong control of these larvae; while at the same time eliciting a delay on the development of the ones that eventually did not dye at first. As for the Cry protein content, the cloned presented a protein profile ranging from

Cordeiro, Juliana Xavier.
Jaboticabal; s.n; 07/08/2009. 45 kDa to p. 66 p.
Tese em Português | VETTESES | ID: vtt-4619
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