Distances between homologous BCR and ABL genes (BB and AA). Distributions of 2D-projections of the distances between homologous BCR genes (□) and ABL genes (▨) in the control (A, B, and E) and in the γ-irradiated (5 Gy; C and D) human lymphocytes. The mean values and standard deviations are given in Table 2. The full (dotted) curves represent the corresponding theoretical distributions calculated by Monte-Carlo simulation using experimentally determined center-to-gene distributions from Fig 1 (according to the RS model).