Figure 2.

Intensity distributions of the Infinium I and II probe types in the methylated and unmethylated channels for normal human kidney sample TCGA-B0-5092-11. The qualitative differences in the intensity distributions are probably driven by the biological differences between the regions that the two probe types are interrogating, which is reflected by the difference in density of CpGs in the body of the probes.

Maksimovic et al. Genome Biology 2012 13:R44   doi:10.1186/gb-2012-13-6-r44
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