Table 1. Effect of UV light on the expression of known p53-responsive genes.

Expression	UV, J/m2	n	Median gene size, bp	mRNA size, log2 bp	Gene size, log2 bp	Gene size, bp†	Total intron size, log2 bp
Random‡	NA	132	29,104	11.1 ± 0.1	14.6 ± 0.2	24,800	14.4 ± 0.2
p53 induced	All	43	13,751	11.1 ± 0.1	14.0 ± 0.2	16,500	13.7 ± 0.3
	0	33	23,036	11.1 ± 0.1	14.1 ± 0.3	17,600	13.8 ± 0.3
	10	32	11,934	11.1 ± 0.1	13.7 ± 0.3 *	13,300	13.5 ± 0.3 *
	30	18	8,176	10.8 ± 0.2	13.2 ± 0.3 **	9,400	12.8 ± 0.3 **

Asterisks indicate that the indicated value is significantly different from randomly selected genes using a Student's test at ^*, P ≤ 0.05 or ^**, P ≤ 0.005. NA, not applicable.

^†For clarity, mean gene size is presented in a linear form but was determined from the mean of transformed values by using the following formula: (mean gene size = 2^{meanlog2 gene size}).

^‡A random number generator was used to generate a random series of Locuslink accession numbers.