ChIP-chip data for the β globin locus in erythroid precursor and HeLa cells. Results from ChIP-chip experiments for GATA-1, RNAP II, and AcH3 in erythroid precursors and AcH3 in HeLa cells analyzed on the custom designed array. The figure covers a 120-kb region (position chr11: 5 180 000-5 302 000) that includes the entire β globin locus. The globin genes are indicated below and include β globin (HBB), δ globin (HBD), γ globin (HBG1 and HBG2) and ϵ globin (HBE), and the βψ pseudogene (HBBP1). The region also includes the olfactory gene (OR51B4). Hypersensitive sites in the β-globin LCR (HS1-HS5) and the upstream HS6 and HS7 are marked with .