Pairwise comparison of transcription factor genes in human early stage erythroid progenitors. Transcription factor genes with log twofold >1 and fpkm >10 in at least 1 stage for CD34 to BFU-E (A), BFU-E to CFU-E (B), and the CFU-E to Pro (C) transitions are shown. In each row, the red, white, and blue colors represent the expression level (from high to low) for each gene.