Table 1. Summary of HPV type, origin, E2BS methylation level and the status of the E2 gene in the included cell lines.

Cell line	HPV Type	Origin	E2BS Methylation	Status E2 Gene
CaSki	16	Cervix	High	Intact
SiHa	16	Cervix	Low	Disrupted
UM-SCC-47	16	Lateral Tongue	High	Disrupted [52], but E2 expression detected [53]
UM-SCC-104	16	Floor of Mouth	Low	Disrupted
C4-1	18	Cervix	Low	Disrupted
SW756	18	Cervix	Low	Disrupted