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Hes-1 Expression in GBM cell lines. RT-PCR analysis of Hes-1 in U87MG (A) and U251MG (B) cells treated with 100 μM APE for 24 and 48 h. The graphs show the densitometric analysis of the bands normalized for the housekeeping 18S. The OD is the mean ± SEM of three independent experiments. (* p < 0.05; One-way ANOVA test).
