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Smad-2 phosphorylation by CR-1ΔC in EpH-4 WT and EpH-4 N cells. Serum-starved EpH-4 WT (A) and EpH-4 N (B) cells were stimulated for different times with CR-1ΔC (400 ng/ml) or Activin A (50 ng/ml) recombinant protein and analyzed by Western blot (WB) analysis. MW, molecular weight in thousands; C, control.
