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Detection of HPV18 DNA in EC109 cells. A-D: HPV18 DNA detection in EC109 cells using the primer pairs Y09/11, GP5 +/6 +, HPV18E6, and HPV18E6-E7, respectively. M1: 100 bp DNA ladder; Neg: Negative control (template of HEK 293 cell DNA); HeLa: Positive control (template of HPV18-infected cervical cancer cells; EC109: DNA from EC109 cells. HPV: Human papillomavirus; EC: Esophageal carcinoma.
