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mRNA expression of apoptotic genes in A549 cells treated with ethanol extracts and water fractions from Prunella vulgaris var. lilacina. Cells were treated with the ethanol extract and water fraction of P. vulgaris var. lilacina at 10 μg/ml. Values are the mean ± SEM; different marks within treatments indicate significant differences (*p < 0.05, **p < 0.01, ***p < 0.001).
