Figure 1

Effect of long-term FR on cell growth in ATM- and NBS1-deficient cells. Cell growth of unirradiated cells (open circles) and cells exposed to 0.01 Gy (open triangles) and 0.05 Gy (open squares) fractions. Growth curves for AT5VIBA (ATM-deficient), AT5VIBA/ATM-wt (ATM-complemented), GM7166 (NBS1-deficient) and GM7166/NBS1-wt (NBS1-complemented) cells are shown.