Comparison of bone marrow and IM-9 cells with intergenic distances ≤2 μm during interphase. (A) Distances PML-RAR in IM-9 cells, CD34⁺ cells and CD34⁺ cells stimulated with IL-3. (B) Distances ABL-BCR in IM-9 cells, CD34⁺ cells and in CD34⁺ cells stimulated with IL-3. See text (Results) for statistically significant differences. The legends are as in Fig 2.