A team from Estonia and Sweden takes a look at DNA methylation patterns in a range of somatic human tissues. Using array-based methods, the researchers profiled 17 tissue types taken from four deceased individuals at the time of autopsy. Across the almost half a million methylation-prone cytosine sites considered, the group found that just 2 percent had high methylation across the full suite of somatic tissues tested, while another 15 percent were regularly methylated at low levels.

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