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The effect of propranolol on MAPK pathway and apoptosis signaling. (A-E) The expression of p-MEK1/2, p-ERK1/2, Bax, Bcl-2 and cleaved-caspase3 in MB49 treated with propranolol (80 µM) was detected by western blot. *, P<0.05, **, P<0.01. All experiments were repeated three times.
