Western blot analysis of extracts from NIH/3T3 cells, transfected with 100 nM SignalSilence® Control siRNA (Unconjugated) #6568 (-) or SignalSilence® Smad4 siRNA I (Mouse Specific) (+), using Smad4 Antibody #9515 (upper) or β-Actin (D6A8) Rabbit mAb #8457 (lower). The Smad4 Antibody confirms silencing of Smad4 expression, while the β-Actin (D6A8) Rabbit mAb is used as a loading control.