Objective To construct an eukaryotic expression vector of HPV 16 E6-E7 fusion protein, for a further study of immunogenicity for the gene vaccine of human papillomavirus type 16 ( HPV16) E6-E7.Methods Eukaryotic expression vector pcDNA3.1(+)/HPV16 E6-E7 was constructed by inserting into pcDNA3.1(+).Enzymes digestion and DNA se-quencing were used to identify E6-E7 gene fragment.HeLa cells were transfected with DNA of plasmid HPV 16 E6-E7 and gene expressions were analyzed by RT-PCR.Immuno-histochemical staining was used to detect the exp...