Fig 2. Viability of HaCaT keratinocytes is not affected by exposure to nicotinamide (NAM), sodium arsenite (As) and UV.

HaCaT keratinocytes were exposed to 50μM nicotinamide, 2μM sodium arsenite or PBS (control) alone, with and without irradiation with 2 J/cm² of UV. Columns represent the mean of the experiments ±SEM (n = 6). There were no significant differences detected between the groups p>0.05, one way ANOVA.