Distances between the nuclear center and BCR (ABL) genes (CB and CA). Distribution of the 2D projections of the distances between the BCR (□) or ABL (▨) genes and the center of nucleus (CB and CA) of the control (A, B, and E) and the γ-irradiated (5 Gy; C and D) human lymphocytes. The mean values and standard deviations are given in Table 2. The corresponding theoretical distributions of the 2D projections of the distances between the center of the sphere and the point randomly placed inside the sphere are shown by the solid line.