Objective To construct the G250 antigen peptide and HBcAg recombinant gene prokaryotic expression plasmid pET28a(+)/C-G250 peptide-C and analyze the immunogenicity of the fusion protein expressed in E.coli BL21(DE3).Methods The gene fragments of encoding G250 antigenic peptide/249-268 were amplified by PCR,the G250 peptide was inserted to remove the major immunodominant region of the recombinant plasmid pGEMEX/HBcAg to obtain the recombinant plasmid pGEMEX/C-G250 peptide-C.For the replacement of the enzyme ...