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新型鸭呼肠孤病毒P18基因的表达与鉴定
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摘要
为鉴定序列推导的新型鸭呼肠孤病毒(NDRV)P18基因是否存在,本研究采用RT-PCR扩增获得NDRV TH11株推导的P18基因,将其亚克隆至原核表达载体p Cold-TF,表达并纯化获得P18重组蛋白。以此重组蛋白为免疫原,制备抗P18的多克隆抗体。Western-blot结果显示,该抗体具有良好的免疫原性。以此制备的抗体为第一抗体,利用IFA和激光共聚焦检测NDRV TH11株感染细胞后,P18蛋白亚细胞定位及动态分布。结果显示,在病毒感染后6h,P18蛋白在细胞浆和细胞核中均能检测到,之后P18蛋白的分布以细胞核为主,在感染后30h,P18蛋白在细胞核检测到,而细胞浆里未能检测到;随后细胞崩解。本研究结果证实NDRV第二个ORF编码P18蛋白,为深入探讨P18蛋白入核分子机理提供线索,为临床早期诊断提供依据。
引文
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