Differential transcription factor genes expression associated with increased HbF expression. (A) Array normalized intensity level (y-axis) for 534 probe sets representing 369 transcription factors. The lines attach average normalized intensity levels for all RNA pools of adult human erythroblasts cultured under low-HbF (left) versus high-HbF (right) conditions are shown. (B) Comparable image of 11 probe sets demonstrating greater than 2.5-fold change in normalized intensity by comparison of low-HbF (left) versus high-HbF (right) culture conditions. Probe identities and intensity levels are shown in Table 2 and supplemental Table 3 (bold font).