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Effects of LL, LL-EA and oleanolic acid on keratinocyte viability. (A) HaCaT was treated with LL for 24 h. (B) HaCaT was treated with LL-EA and oleanolic acid for 24 h. Cell viability was assessed using the Ez-Cytox assay and measured at 450 nm. Values are presented as the mean ± SD of three determinations (n=3).
