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HPV integration mechanisms in SiHa and HeLa cells. A, B The figure shows the alignment of the sequence around the integration site between the human genome (rose red) and the HPV16/HPV18 genome in SiHa cells or HeLa cells (dark green), respectively. The black box represents the aligned nucleotides in the microhomology (MH) region of the two reference sequences at the HPV integration site
