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猪肠球菌溶血素cylA基因原核表达载体的构建

Acta Agriculturae Jiangxi(2009)

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Abstract
以猪致病性粪肠球菌染色体DNA为模板,PCR扩增溶血素cylA基因,相应酶切后,克隆到原核表达载体pET32a中,构建pET32a-cylA重组质粒,并将pET32a-cylA质粒转化入大肠杆菌BL21(DE3)。经HindⅢ、XhoI双酶切及测序鉴定,并与已发表的肠球菌溶血素cylA基因序列比较,同源性达99.8%。表明成功构建猪肠球菌溶血素cylA基因的重组表达质粒,为制备单抗、开发疫苗及其致病机制研究奠定了基础。
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Key words
Swine,Enterococus faecalis,Hemolysin,Prokaryotic expression
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