Figure 4.
Validation of the use of a normalization sample against WGBS data. Beta values from all sample sheet rankings (R1–R10 including 12 samples) normalized with Illumina-like normalization process and generated with the 450k array were compared with beta values received from WGBS of the cryo-preserved sample. (A) Density plots showing beta values normalized without (upper left panel) and with (upper right panel) the use of a normalization sample compared to WGBS data from the same sample and CpGs. Results are depicted for the sample S1. Absolute difference between matched CpGs on the 450k array and WGBS data was calculated for each sample sheet ranking normalized without (lower left panel) and with (lower right panel) the use of a normalization sample. (B) Mean was calculated summarizing the absolute difference for each sample within each sample sheet ranking from 450k array compared to the WGBS data (only cryo-preserved samples).