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Effects of Sp1 and Smad siRNAs on protein expression of Sp1 and Smads determined by Western blot in the presence of TGFβ1 (10 ng/mL). C, negative control siRNA. KD, knock down. The values are expressed as means ± SE of relative densitometry of six measurements per group *p < 0.05 versus control; **p < 0.01 versus control.
