This genomic sequence was predicted to be a transcriptional regulatory region based on chromatin state analysis from the ENCODE (ENCyclopedia Of DNA Elements) project. The major subregion was validated as an active enhancer by the ChIP-STARR-seq massively parallel reporter assay in naive human embryonic stem cells, where it is marked by the H3K27ac and H3K4me1 histone modifications. Another subregion was validated as an enhancer by Sharpr-MPRA (Systematic high-resolution activation and repression profiling with reporter tiling using massively parallel reporter assays) in K562 erythroleukemia cells (group: K562 Activating non-DNase unmatched - State 23:Low, low signal proximal to active elements), with weaker activity in HepG2 liver carcinoma cells (group: HepG2 Activating DNase unmatched - State 9:DNaseU, primarily UW DNase, weaker open chromatin sites). [provided by RefSeq, Jan 2023]