A 1.66 kb expected S1 gene fragment of avian infectious brochitis virus (IBV) H strain was amplified by RT PCR. Its PCR/RFLP pattern was similar to IBV D 41 strain and M 41 strain when digested using BstYI, HaeⅢ and ...A 1.66 kb expected S1 gene fragment of avian infectious brochitis virus (IBV) H strain was amplified by RT PCR. Its PCR/RFLP pattern was similar to IBV D 41 strain and M 41 strain when digested using BstYI, HaeⅢ and EcoRI respectively. IBV H strain was thought as Massachusetts serotype.展开更多
目的基于ITS序列用PCR-RFLP方法鉴别北柴胡药材掺伪藏柴胡的方法。方法分析并筛选出藏柴胡特有的限制性内切酶AseⅠ,用Primer Premier 5.0设计特异性引物,对引物PCR扩增条件和酶切试验进行优化,并对该方法的准确性进行了考察。结果PCR...目的基于ITS序列用PCR-RFLP方法鉴别北柴胡药材掺伪藏柴胡的方法。方法分析并筛选出藏柴胡特有的限制性内切酶AseⅠ,用Primer Premier 5.0设计特异性引物,对引物PCR扩增条件和酶切试验进行优化,并对该方法的准确性进行了考察。结果PCR扩增的目的片段为331 bp,且建立的PCR反应方法对不同的酶均具有适应性。限制性内切酶AseⅠ将藏柴胡切成79 bp和252 bp两个片段,而北柴胡及其他柴胡均不能被酶切,且掺伪检出限为1%。结论PCR-RFLP方法实现了准确鉴别北柴胡中的混伪品藏柴胡。展开更多
文摘A 1.66 kb expected S1 gene fragment of avian infectious brochitis virus (IBV) H strain was amplified by RT PCR. Its PCR/RFLP pattern was similar to IBV D 41 strain and M 41 strain when digested using BstYI, HaeⅢ and EcoRI respectively. IBV H strain was thought as Massachusetts serotype.