The eukaryotic expression plasmid (pcDNA3 CEA)containing with the gene coding for the Carcinoembryonic antigen(CEA) had been gotten with RT PCR and gene recombination techniques.Using enzymolysis,ligation and other te...The eukaryotic expression plasmid (pcDNA3 CEA)containing with the gene coding for the Carcinoembryonic antigen(CEA) had been gotten with RT PCR and gene recombination techniques.Using enzymolysis,ligation and other techniques,an eukaryotic coexpression plasmid(pcDNA3 CEA/HN)containing two expression unites of CEA and Newcastle disease virus HN gene that may have the function of immunoenhancement had been constructed.The plasmid will lay a foundation for further researching CEA nucleiotide vaccine,adjuvant and their effect of special antitumor immune.展开更多
Six isolates of Newcastle disease virus were derived from south and east China regions during the disease outbreaks called "avian paramyxovirus infection of geese" or "geese paramyxovirus infection"...Six isolates of Newcastle disease virus were derived from south and east China regions during the disease outbreaks called "avian paramyxovirus infection of geese" or "geese paramyxovirus infection",and partial sequence analysis of hemagglutinin-neuraminidase(HN) gene was carried out to identify the genetic characteristics of these goose isolatesA 1905 nucleotide portion of HN gene of each of the 6 isolates was sequenced,the results revealed that the coding region of their HN genes are all 1716 nucleotides in length,which can encode 571 amino acid residues aloneThe coding region is followed by a noncoding sequence of 189 nucleotidesThough they diverged only 08%-37% from each other in the nucleotide sequences of coding region,they differed by 175%-179% to F48E8, a standard challenge strain of chicken originCysteine residues are well conserved throughout the amino acid sequences,while the number of the potential glycosylation sites varys from 4 to 6Residue positions Thr 48,His 54,Ser 77,Ala 266,His 340 and Lys 384 are also highly conserved in the 6 goose isolatesThe corresponding residues in other NDV strains are commonly Met 48,Ser 54,Asn 77,Ile 266,Tyr 340 and Glu 384However,the sequences of receptor-binding related regions show no difference to the 14 reference strains from domestic or展开更多
文摘The eukaryotic expression plasmid (pcDNA3 CEA)containing with the gene coding for the Carcinoembryonic antigen(CEA) had been gotten with RT PCR and gene recombination techniques.Using enzymolysis,ligation and other techniques,an eukaryotic coexpression plasmid(pcDNA3 CEA/HN)containing two expression unites of CEA and Newcastle disease virus HN gene that may have the function of immunoenhancement had been constructed.The plasmid will lay a foundation for further researching CEA nucleiotide vaccine,adjuvant and their effect of special antitumor immune.
文摘Six isolates of Newcastle disease virus were derived from south and east China regions during the disease outbreaks called "avian paramyxovirus infection of geese" or "geese paramyxovirus infection",and partial sequence analysis of hemagglutinin-neuraminidase(HN) gene was carried out to identify the genetic characteristics of these goose isolatesA 1905 nucleotide portion of HN gene of each of the 6 isolates was sequenced,the results revealed that the coding region of their HN genes are all 1716 nucleotides in length,which can encode 571 amino acid residues aloneThe coding region is followed by a noncoding sequence of 189 nucleotidesThough they diverged only 08%-37% from each other in the nucleotide sequences of coding region,they differed by 175%-179% to F48E8, a standard challenge strain of chicken originCysteine residues are well conserved throughout the amino acid sequences,while the number of the potential glycosylation sites varys from 4 to 6Residue positions Thr 48,His 54,Ser 77,Ala 266,His 340 and Lys 384 are also highly conserved in the 6 goose isolatesThe corresponding residues in other NDV strains are commonly Met 48,Ser 54,Asn 77,Ile 266,Tyr 340 and Glu 384However,the sequences of receptor-binding related regions show no difference to the 14 reference strains from domestic or
