TABLE 1.

Estimated prevalence of genomic features associated with enhancers in human and mouse genomes

Feature numbers are highly dependent on the source material as well as experimental and analytical parameters; thus, these figures should be treated as rough estimates.

Feature	No. in human genome	No. in mouse genome
DNase-seq/FAIRE-seq	80,000–225,000 (9, 98, 99)	121,378–720,631 (71, 100)
Distal H3K4me1 ± H3K27ac	24,566–58,023 (22, 45)	17,809–76,001 (30, 33, 55)
Distal P300	1664–8703 (31, 63, 67)	540–10,741 (22, 26, 29, 33, 62, 64, 91)