文献类型: 外文期刊
第一作者: Zhou, Zishan
作者: Zhou, Zishan;Song, Fuping;Shu, Changlong;Zhang, Jie;Huang, Dafang
作者机构:
关键词: Bacillus thuringiensis;Cry1Ah;Toxicity;Minimal active fragment;Plutella xylostella
期刊名称:BIOTECHNOLOGY LETTERS ( 影响因子:2.461; 五年影响因子:2.457 )
ISSN:
年卷期:
页码:
收录情况: SCI
摘要: cry1Ah1, a novel holo-type gene cloned from Bacillus thuringiensis strain BT-8, encoded a protein exhibiting strong insecticidal activity against lepidopteran insects. To identify the minimal active fragment of the Cry1Ah toxin, 9 pairs of primers were designed to generate different PCR products. Seven PCR products were amplified by different primers using the cry1Ah1 gene as a template and cloned into a pET-21b vector. These positive clones were separately transformed into Escherichia coli. Insecticidal activity against 2nd-instar larvae of Plutella xylostella was performed using the leaf-dip bioassay: the minimal active fragment of the Cry1Ah toxin was located between amino acid residues 50I and 639E.
分类号: Q7
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