Table 2.

Frequency of association of specific chromosomal bands with stress-induced SNBs

Chromosome	Probe	Association with stress-induced SNBs (percentage of cells)
		+	−	n
9	Sat III	75a	25	279
12	Sat α	70b	30	64
15	Sat α	80c	20	58
X	Sat α	24d	76	96

Stress-induced SNBs and interphase territories were labeled, optical sections through whole nuclei were collected at 0.5 μm intervals, and overlap between the stress-induced SNBs and signals obtained with satellite specific probes was scored as (+) or (−). The assignment to either (+) or (−) classes was independently done by two individuals. The number of cells (n) analysed as indicated. 

^aProbability of a specific association between HSA9 and stress- induced SNBs: χ²₁ = 69.25; P << 0.0001. 

^bProbability of a specific association between HSA12 and stress-induced SNBs: χ²₁ = 12.65; P << 0.0001. 

^cProbability of a specific association between HSA15 and stress-induced SNBs: χ²₁ = 30.37; P << 0.0001. 

^dProbability of a random association between X chromosome and stress-induced SNBs: χ²₁ = 24.04; P << 0.0001.