RESUMO
Objective To investigate the gene sequence and mutations of human papillomavirus(HPV)type16E6E7in patients with HPV infection in Beijing.Methods Sample DNA was extracted from lesions in patients with HPV infection.HPV types were identified by polymerase chain reaction(PCR).E6E7gene,isolated from samples infected with HPV16only,was cloned into plasmid pGEM-3zf and sequenced.Results The recombinant plasmid pGEM/16E6E7was constructed successfully.The whole HPV E6E7gene was776bp in length which was equal to that of the standard strain.Three nucleotides exchanges,i.e.,p60PROE6,p96GLUE6,p565SERE7,were found in E6E7gene.Conclusion The data suggest that there are nucleotide differences of HPV E6E7gene between HPV obtained from Beijing and that of standard sequence.