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Arsenic-induced degradation of ΔNp63 protein is inhibited by MG132, an inhibitor of 26 S proteasome. A and B, Western blot analyses were prepared with extracts from ME-180 (A) and HaCaT (B) cells that were left untreated or pretreated with 4 μm MG132 for 4 h and then left untreated or treated with arsenic trioxide for 7 h.
