Comparison of histone modifications in CD34⁺CD38^lo, CD34⁺, and CD34⁺38⁺10⁻19⁻ cord blood progenitors. ChIP analyses of multipotent CD34⁺CD38^lo (▭), total CD34⁺ (), and B-lymphoid–depleted CD34⁺38⁺10⁻19⁻ () progenitors with antibodies to histone H4Ac, H3Ac, and H3K4me2 at B-lymphoid (B), T-lymphoid (T), erythroid (E), nonhematopoietic (N), and β2-microglobulin (B2m) genes. Results are shown as enrichment values (bound/input) relative to the B2m control and are means and standard deviations of 2 to 5 independent ChIP experiments analyzed in triplicate.