Figure 2. Detection of HPV PCR products with agarose gel electrophoresis in representative examples. The housekeeping gene was positive
in all samples; human papilloma virus (HPV) was positive in the positive control but negative in the adenoid cystic carcinomas
(ACCs). TBXAS1: Housekeeping gene PCR product, 100 bp; MGP: Modified general primer HPV PCR product, 158–168 bp; M: Molecular
weight ladder; 1: Positive control, condyloma acuminatum; 2–9: Representative examples of ACCs.