支气管败血波氏杆菌dnt基因的克隆、表达及活性鉴定

来源 :河南农业科学 | 被引量 : 0次 | 上传用户:qianxr
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通过PCR扩增获得支气管败血波氏杆菌的全长4 395 bpdnt基因,并利用pET-28a/BL21系统对其进行了融合表达。Western-blot检测结果表明,表达产物具有良好的免疫学活性。使用His-band purification kit纯化后,得到纯度为93.2%的融合蛋白HIS6-DNT。在乳鼠皮肤坏死试验中,表达产物HIS6-DNT和天然DNT均能导致乳鼠皮肤产生坏死性病变。在乳鼠皮肤坏死阻断试验中,兔抗HIS6-DNT血清能中和天然DNT,使其失去对乳鼠皮肤的坏死毒性。试验结果表明,重组蛋
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