Fig. 4

A) The mean number of reference reads for serial 10-fold dilutions of SiHa and HeLa cells in HEK cells. B) The number of normalized reads (HPV amplicon reads per 10,000 reference reads) generated for each of the HPV16 amplicons in the analysis of the HPV16-positive SiHa: HEK dilutions. C) The number of normalized reads (HPV amplicon reads per 10,000 reference reads) generated for each of the HPV18 amplicons in the analysis of the HPV18-positive HeLa: HEK dilutions. Dotted horizontal line: normalized read cut-off