Objective To construct a prokaryotic expressing system that harbors human papillomavirus type-16( HPV16) E7 gene with codon optimization and to evaluate the immunogenicity of fusion protein E7 through preparation of specific antibodies. Methods HPV16 E7 gene with codon optimization was artificially synthesized and amplified by using specific primers. E7 gene was cloned into prokaryotic expressing vector to construct recombinant expressing plasmid pMAl-c2X-E7. After transfection of pMAl-c2X-E7 to DE3 compete...