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p300 inactivation inhibits SMAD2/3 nuclear accumulation induced by TGF‐β1. IF revealed that TGF‐β1‐induced SMAD2/3 nuclear accumulation was inhibited by p300 knockdown (A) or C646 (B). *, P < 0.05 by t test, n > 100 cells per group. Bar, 50 µm. Abbreviation: NT, nontargeting.
