Figure 7.
UVA–UVB or UVC-induced mutation frequency at the HPRT locus. HPRT mutation frequency in xeroderma pigmentosum variant cells exposed to UVC (closed triangles, n = 1) and NHF1 exposed to a solar simulator (closed circles, n = 4) or UVC (open diamonds, n = 4) expressed as mutants per 106 surviving cells ±SEM. The mutation frequency induced by UVA–UVB was not statistically different from that induced by UVC (P = 0.2 and 0.69 for 122 or 242 CPD/Mb, respectively, Wilcoxon rank-sum test).
