Pattern of histone H3 and H4 acetylation at lymphoid- and myeloid-affiliated genes in cord blood cells. Chromatin from multipotent CD34⁺CD38^lo, B-committed CD19⁺, and erythroid GpA⁺ cells was analyzed by ChIP using antibodies to acetylated histone H4 (A) and H3 (B) followed by real-time PCR with primers specific for B-lymphoid (B), T-lymphoid (T), erythroid (E), myeloid (M), nonhematopoietic (N), and β2-microglobulin (B2m) genes. Histogram shows enrichment values (bound/input) normalized to B2m control (set at 1). Results are means and standard deviations of 3 to 5 independent ChIP experiments analyzed in triplicate.