Transcriptional responses to biologically relevant doses of UV-B radiation in the model archaeon, Halobacteriumsp. NRC-1

Table 1 Induction of CPDs (cyclobutane pyrimidine dimers) by different doses¹ of UV-C [47] used in microarray studies compared to CPDs induced by sunlight [49]

UV-C dose	CPDs induced per kb	Duration of UV dose	Reference (Organism studied)
200 J/m²	1.67	1.05 min	Baliga et al. (Halobacterium) [11]
			Gotz et al. (Sulfolobus) [25]
75 J/m²	0.63	not known	Fröls et al. (Sulfolobus) [28]
70 J/m²	0.59	1.16 min	McCready et al. (Halobacterium) [26]
40 J/m²	0.33	1 min	Courcelle et al. (E. coli) [22]
30 J/m²	0.22	0.5 min	McCready et al. (Halobacterium) [26]
Sunlight for 1 day	0.50	12 hours	Wilhelm et al. (²DNA dosimeter) [29]
Sunlight for 1 day	1.00	12 hours	Visser et al. (²DNA dosimeter) [30]

¹ Irradiation schemes vary in each case.
² In a DNA dosimeter, naked DNA is exposed to sunlight and the number of CPDs is measured.