Distribution of expression of FLI1 in AML. (A) Distribution of expression of FLI1 based on BM versus PB. (B) Distribution of expression of FLI1 based on disease status: the expression between 47 paired diagnosis and relapse specimens is shown. The expression ranges of normal CD34⁺ cells are shown beside the y-axis. (C) Histogram of expression in all AML patients relative to normal CD34⁺ cells. FLI1 levels were above normal CD34⁺ cells in 31.8% of AML patients and below normal in 4.8%. Expression is shown in log 2 scale. The rug immediately above the x-axis shows the APL patients. Three different “normal controls” are shown as rugs below the x-axis, including G-CSF–primed CD34⁺ cells (top), normal CD34⁺ cells (middle), and PBLs (bottom).