Figure 4
From: Definition, conservation and epigenetics of housekeeping and tissue-enriched genes
Histone acetylation enrichment at transcription start sites of housekeeping genes. (A) Each dot represents the percentage of sites with histone acetylation [39] in a 500 bp sliding window advancing 100 bp each time within 5 kb of the transcription start site. (B) HKGs and RefSeq genes from panel A are further partitioned into subgroups based on their expression level (probe intensity) in Hep G2 cells: RefSeq-low (intensity < 1), RefSeq-intermediate (1 < intensity < 3), RefSeq-high (intensity >3), HKG-low (1 < intensity < 3), HKG-intermediate (3 < intensity < 6), HKG-high (intensity > 6).