From: Definition, conservation and epigenetics of housekeeping and tissue-enriched genes
 | Transcription start sites | Transcription end sites |  | ||||
---|---|---|---|---|---|---|---|
 | Number of genes with CpG islands (ratio) | CpG density (/bp) | P-value | Number of genes with CpG islands (ratio) | CpG density (/bp) | P-value | Total number of genes in class |
HKGs | 1,230 (80.8%) | 0.563 | 3.5E-40 | 84 (5.5%) | 0.02 | 3.0E-14 | 1,522 |
TEGs | 279 (28.6%) | 0.155 | 3.4E-40 | 49 (5.0%) | 0.02 | 6.6E-13 | 975 |
RefSeq genes | 8,881 (48.9%) | 0.321 | Â | 2086 (11.5%) | 0.053 | Â | 18,149 |