highly significantP = 2.6 × 10 -63
However, these overlaps were highly significant relative to a genomic background composed of 1-kb bins (Fisher’s exact test, P = 2.6 × 10 -63 for SETα; P = 1.9 × 10 -45 for SETβ), suggesting that SET isoforms are nonrandomly associated with ETV5-bound regulatory loci.