This is strongly supported by genome-wide ChIP studies showing that MYB, C/EBPβ, and p300 (together with other myeloid transcription factors) co-localize at many genomic sites in AML cells which correspond to cis-acting transcriptional control regions of genes, such as MYC and GFI1, which are expressed in these cells [65]. The gene discussed is GFI1; the disease is acute myeloid leukemia.