In this analysis the raw data (.idat files) of 8 samples belonging of two different groups (MUT and WT), obtained from two different Illumina Infinium HumanMethylation450 BeadChip, were processed and analysed using the ‘minfi’ package in R. Two .idat files are present for each array, the pairs of files are named consistently, with one representing the red channel and the other representing the green channel.