Figure 4. Frequency plot of DNA copy number aberrations in immortal cell lines.

Cell lineages without crisis including HPV16, 18, 31, 33 and 35 (n=11) are shown in dark red and blue, and cell lines with a crisis prior to immortalization including HPV45, 51, 59, 66 and 70 (n=9) are shown in light red and blue. Red indicates a gain and blue a loss.