Table 1.

Comparison of damages and products caused by 222- and 254-nm irradiation.

Wavelength (nm)	E. coli protein	Plasmid DNAa		FAD	UpUb		dTpdTc	Angiotensin II	Chymotripsin
	Damage	Damage	Photorepair	Damage	Damage	Product	Product	Damage	Catalyst ability
222	High	Low	Low	High	Low	(6-4)PP/hydrate	(6-4)PP	High	High reduction
254	Low	High	High	Low	High	CPD/ (6-4)PP/hydrate	CPD/ (6-4)PP	Low	Low reduction

FAD, flavin adenine dinucleotide; Angiotensin II, an oligopeptide of Asp-Arg-Val-Tyr-Ile-His-Pro-Phe; Chymotripsin, a protease with a binding pocket of His, Ser and Asp; (6-4)PP, (6-4)photoproduct of pyrimidine dimer; CPD, cyclobutane pyrimidine dimer.

^aAfter plasmid DNA is irradiated by UV light, it is transformed into an E. coli cell.

^bRNA UpU.

^cDNA dTpdT.