TABLE 2.

Measurement by Flow-FISH of telomere length in MEFs obtained from DNA-PKcs^+/− heterozygous crosses

Embryo	Litter	Genotype	Telomere lengtha
A1	1	−/−	2.45
A2		+/−	2.91
B3	2	+/−	2.53
B4		−/−	2.58
B5		+/+	2.56
B6		−/−	2.68
C2	3	−/−	2.68
C3		+/+	2.76
C5		+/+	2.82
C9		−/−	2.51

^aTelomere length is expressed in arbitrary fluorescence units which have been normalized against a calibration curve on R and S cells (see Materials and Methods).