Flow-FISH analysis of telomere length of mouse cell lines following inhibition of DNA-PKcs activity. A reduction in TFI unit where observed when both mouse cell lines were treated with DNA-PKcs inhibitor. The difference between the percentage reduction between the treated and untreated were statistically significant (p < 0.0001). TFI unit were measured from at least 1000 cells in G0/G1 phase of cell cycle in each experiment from a total of seven independent experiments. The error bars represent s.d.