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Figure 3 Analysis of chromosomal instability after irradiation. Lymphoblastoid cells of the two probands, JR and PR, were irradiated with the indicated dose and chromosomal damage was scored in preparations of mitotic cells. Data are shown as breaks per cell and in comparison to the mean values of 18 normal control subjects (controls) and those of four NBS patients homozygous for the 657del5 mutation. A total of 75 metaphases were counted for each preparation.
