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Fluorescence of keratinocyte and fibroblast cells treated for 24 h with 2nd and 3rd generation PAMAM dendrimers (0.3 mg/mL, 1.5 mg/mL and 3.0 mg/mL) incubated with mitochondrial membrane potential probe JC-1. The x- and y-axes are green and red fluorescence, respectively. Mean percentage values from three independent experiments (n=3) done in duplicate are presented. *p<0.05 versus the control group, **p<0.01 vs the control group.
