检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
机构地区:[1]黑龙江省兽医卫生防疫站 [2]中国农业大学动物医学院
出 处:《中国畜禽传染病》1998年第1期40-42,共3页
摘 要:用EDS76病毒标准AV127株和分离株(B96株)感染鸭胚,提取病毒核酸,分别经EcoRl和Pstl双酶切,获得图形和大小相似的酶切片段。分别进行EcoRl和Pstl单酶切,也得到相似结果。病毒DNA经EcoRl和Pstl双酶切后,与PUC19质粒载体重组,并转化到EcoliJM101中,筛选出一个插入片段(G片段)约为27kb的重组质粒。用Digoxigemin标记EDS76DNAG片段(EcoRl和Pstl双酶切片段)及含该片段的重组质粒分别制备探针,对EDS76病毒DNA进行斑点杂交,两种探针均为阳性,而对照组NDV、IBV、ILTV、IBDV正常鸭胚尿囊液的核酸为阴性。且后一种探针的敏感性高于前者,它的DNA检出限量为4pg水平。结果表明,两种探针具有高度的特异性、敏感性。After a standard EDS76 strain AV 127 virus or a field isolate strain B96 virus was inoculated in duck embryos,viral DNA was extracted from the duck embryo allamoic fluids and digested with endonuclease EcoRI and PstI,The produced fragments were very similar in restriction patterns and size of fragments,An EDS76 virus DNAG fragment with 27kb was obtained,The fragment was recombined with PUC 19 plasmid lineared with the same restriction enzyme,then it was trasformed into E coli JM 101,The recombinant which has an inserted fragment with 27kb was obtained,The recombinant and the EDS76 virus DNAG fragment were labelled with digoxigenin as DNA probes for EDS76 virus,Dotblot bybridiztion with the two probes showed positive result for EDS76 virus DNA,but negative for the nucleic acid samples obtained from NDV,IBV,ILTV,IBDV and duck embryo allantoic fuild,The sensitivity of the recombinant plasmid PUC19 probe,DNAdetection limit being 4pg was superior to that of the EDS76 virus DNAG fragmentprobe,It was demonstrated that two probes were of high specificity and sensitivity.
分 类 号:S854.43[农业科学—临床兽医学] S858.315.3[农业科学—兽医学]
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:18.217.178.138