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. Author manuscript; available in PMC: 2015 Jun 3.
Published in final edited form as: Photochem Photobiol. 2013 Nov 28;90(1):145–154. doi: 10.1111/php.12194

Figure 4.

Figure 4

Checkpoint kinase 1 (CHK1) phosphorylation in NHF1 exposed to UVA–UVB or UVC. Fluences of UVA–UVB or UVC were chosen so as to produce equivalent CPD burdens. a) Immunoblot showing P-CHK1 (S345), total CHK1 and ACTIN. b) Quantification of immunoblots (n = 3) by densitometry ±SEM. Densitometry values were normalized to the highest ratio of P-CHK1:total CHK1 in each experiment. The normalized ratios of P-CHK1 to total CHK1 produced by the UVA–UVB source (open bars) were not statistically different (Wilcoxon rank-sum test) from those produced by UVC (filled bars) at equal CPD densities.