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棉铃虫中肠cDNA表达文库的免疫筛选及其克隆分析

DOI: 10.7668/hbnxb.2010.02.004, PP. 18-22

Keywords: 棉铃虫,cDNA表达文库,免疫筛选,粘蛋白,PAS显色

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Abstract:

昆虫围食膜是保护其中肠的一道物理屏障,破坏围食膜就可能使其中肠处于不正常的生理状态而最终导致死亡。本研究提取棉铃虫Helicoverpaarmigera(Hbner)围食膜蛋白,成功制备棉铃虫围食膜蛋白多克隆抗体,并对棉铃虫中肠cDNA表达文库进行免疫筛选,共得到385个阳性克隆。对其中26个克隆进行鉴定并测序分析,结果表明19个克隆为肠粘蛋白。过碘酸-希夫试剂(PAS)显色法检测棉铃虫围食膜蛋白组成,发现围食膜蛋白大部分为糖蛋白。通过对棉铃虫中肠围食膜蛋白的分离鉴定,为进一步分析棉铃虫围食膜蛋白的生理功能,寻找生物防治新靶标,开发新型高效生物杀虫剂提供理论依据。

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