Characterization of H3K9me2-enriched regions. A, Size distribution of H3K9me2-enriched regions. B, Distribution of transcript signals for all genes (black broken line) and H3K9me2-marked genes (red solid line). C and D, Average H3K9me2 profiles (red lines) at H3K9me2-marked genes in the pericentromeric heterochromatin (C) and the euchromatic chromosome arms (D). The black lines represent the H3K9me2 profiles of genes not marked by H3K9me2; the gray lines indicate 95% confidence intervals. The light blue bars represent the annotated gene body from transcription start (left) to transcription end (right). Profiles are shown around annotated start (™3 kb…+1 kb) and end (™1 kb…+3 kb) positions.