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Cell viability of human epidermal keratinocytes (HEKa) treated with different concentrations of soluble proteins (SP) and soluble proteins with MW > 30 kDa (SP > 30), not treated (Native) and heat-denatured for 10 min at 100 °C (Heat Treatment 100 °C). Data are mean values of six independent experiment ± SD. Statistical analysis was carried out by ANOVA test followed by Dunnett’s post-test, * p < 0.05, ** p < 0.01 and *** p < 0.001.
