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. 2013 Oct 21;19(39):6598–6603. doi: 10.3748/wjg.v19.i39.6598

Figure 1.

Figure 1

Analysis of DNA from esophageal tumor tissue for human papillomavirus using nested- polymerase chain reaction for human papillomavirus L1 gene. The MY09/11 primer pair was used in the first step (A) and the GP5/GP6 primer pair was used in the second step (B). 1: DNA size marker (100 bp DNA ladder); 2: Patient tumor DNA: [human papillomavirus (HPV)]-negative; 3: HPV DNA-negative control (Human Genomic DNA); 4: HPV DNA-positive control (cervicovaginal sample); 5: Negative control containing all polymerase chain reaction reagents except DNA.