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	Provedor de dados Genet. Mol. Biol. (1) Autor An,Xu (1) Chuan-Xiao,Xie (1) Jian-Bo,Yang (1) Jian-Min,Yao (1) Li-Jun,Wu (1) Zeng-Liang,Yu (1) Mais... Palavra-chave 60Co-gamma rays (1) Base substitution (1) Escherichia coli (1) Low-energy nitrogen ion beam implantation (1) Tipo do documento Info:eu-repo/semantics/article (1) Ano 2004 (1) País Brazil (1) Idioma Inglês (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 1 Primeira ... 1 ... Última Comparison of base substitutions in response to nitrogen ion implantation and 60Co-gamma ray irradiation in Escherichia coli Genet. Mol. Biol. Chuan-Xiao,Xie; An,Xu; Li-Jun,Wu; Jian-Min,Yao; Jian-Bo,Yang; Zeng-Liang,Yu. To identify the specificity of base substitutions, a novel experimental system was established based on rifampicin-resistant (Rif r) mutant screening and sequencing of the defined region of the rpoB gene in E. coli. We focused on comparing mutational spectra of base substitutions induced by either low energy nitrogen ion beam implantation or 60Co-gamma rays. The most significant difference in the frequency of specific kinds of mutations induced by low energy nitrogen ion beam was that CG <FONT FACE=Symbol>®</font>TA transitions were significantly increased from 32 to 46, AT <FONT FACE=Symbol>®</font>TA transversions were doubled from 7 to 15 in 50 mutants, respectively. The preferential base substitutions induced by nitrogen ion... Tipo: Info:eu-repo/semantics/article Palavras-chave: Base substitution; Low-energy nitrogen ion beam implantation; 60Co-gamma rays; Escherichia coli. Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000200025 Registros recuperados: 1 Primeira ... 1 ... Última

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