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Percentage of recovery of thymidine (a) and leucine (b) incorporation following incubation under PAR and UV-A radiation for 4 h compared to the respective incorporation rate measured after incubation in the dark for 4 h following UV-B exposure. The response measured in the PAR treatment was subtracted from that measured in the PAR plus UV-A treatment to distinguish between the photoreactivation induced by UV-A and that induced by PAR.
