Smad6 and Smad7 prevent ligand-induced activation of signal-transducing Smad proteins in the transforming growth factor-beta family .
smad6 and smad7 prevent ligand-induced activation of signal-transducing smad proteins in the transforming growth factor-beta family .
B-protein_molecule O B-protein_molecule O O O O B-protein_family_or_group I-protein_family_or_group I-protein_family_or_group O O B-protein_family_or_group I-protein_family_or_group I-protein_family_or_group I-protein_family_or_group O