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. 2012 May 9;3(4):462–474. doi: 10.18632/oncotarget.497

Figure 4. Comparison of length and DNA methylation attributes of intronic promoters and intronic sites without transcription initiation.

Figure 4

(A) Percentage of intronic length occupied by transcription initiation sites (black) and versus sites without transcription initiation (grey). Percent DNA methylation levels for transcription initiation sites are regressed against methylation levels for non-transcription initiation sites for (B) GM12878, (C) K562 and (D) HepG2 cell-lines. Genes are grouped into 100 methylation level bins. Pearson correlation coefficient values (r) along with their significance values (P) are shown for each regression.