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Changes in expression and phosphorylation of Smad proteins (A) along with corresponding densitometry analyses (B) of western blot results. All after 48 h and 72 h of L1 treatment. Representative data of three independent experiments are presented. Significantly different * p < 0.05, ** p < 0.01, *** p < 0.001 vs. untreated cells (control); ++ p < 0.01, +++ p < 0.001 vs. TGF-β; ### p < 0.001 vs. L1.
