By means of PCR,the gene encoding gD of bovine herpesvirus-1 (BHV-1) strain Luojing was amplified,cloned and sequenced.The nucleotide sequence of this gD gene was (1 251 bp,)encoding 417 amino acids.Comparied with the...By means of PCR,the gene encoding gD of bovine herpesvirus-1 (BHV-1) strain Luojing was amplified,cloned and sequenced.The nucleotide sequence of this gD gene was (1 251 bp,)encoding 417 amino acids.Comparied with the published P8-2 strain,the homology of the necleotide sequence is 99.92%,and that of the deduced amino acid sequence is 100%.The results indicated that gD of BHV-1 was highly conservative.展开更多
Porcine parvovirus (PPV) is one of the major agents causing swine reproductive failure. NS1 protein is a non-structural protein of PPV and can be used as a reagent for differentiation of vaccinated animals and infecte...Porcine parvovirus (PPV) is one of the major agents causing swine reproductive failure. NS1 protein is a non-structural protein of PPV and can be used as a reagent for differentiation of vaccinated animals and infected ones. In present study, a recombinant plasmid pET28a/NS1 was constructed by cloning the coding sequence for NS1 of PPV into pET28a, a bacterial expression vector. The NS1 protein was expressed in E. coli BL21(DE3) after induced by IPTG and the recombinant fusion protein was purified with affinity chromatography. Expression amount of NS1 protein was improved by optimizing the inducing parameters. The recombinant NS1 protein is reactive to PPV positive sera in Western blot and ELISA test and therefore can be applicable in differential diagnosis of PPV infections.展开更多
文摘By means of PCR,the gene encoding gD of bovine herpesvirus-1 (BHV-1) strain Luojing was amplified,cloned and sequenced.The nucleotide sequence of this gD gene was (1 251 bp,)encoding 417 amino acids.Comparied with the published P8-2 strain,the homology of the necleotide sequence is 99.92%,and that of the deduced amino acid sequence is 100%.The results indicated that gD of BHV-1 was highly conservative.
文摘Porcine parvovirus (PPV) is one of the major agents causing swine reproductive failure. NS1 protein is a non-structural protein of PPV and can be used as a reagent for differentiation of vaccinated animals and infected ones. In present study, a recombinant plasmid pET28a/NS1 was constructed by cloning the coding sequence for NS1 of PPV into pET28a, a bacterial expression vector. The NS1 protein was expressed in E. coli BL21(DE3) after induced by IPTG and the recombinant fusion protein was purified with affinity chromatography. Expression amount of NS1 protein was improved by optimizing the inducing parameters. The recombinant NS1 protein is reactive to PPV positive sera in Western blot and ELISA test and therefore can be applicable in differential diagnosis of PPV infections.
