Figure 5.

Distribution of intra- and inter-strand thymine photoproducts within UVC-irradiated freeze-dried DNA (<>c,a, <>c,s, <>t,s and <>t,a, cis,anti, cis,syn, trans,syn and trans,anti cyclobutane dimers). Yields of formation of intra-strand photoproducts were taken from Douki and Cadet (26). Results represent the yield of formation ± SE obtained by linear regression of the level of lesion with respect to the applied dose (n = 15). For the trans,syn and cis,anti cyclobutane dimers, the (6–4) and the spore photoproducts, reported values represent the sum of the yield of the two diastereoisomers.