Activin Receptors, Type IIActivin ReceptorsActivinsActivin Receptors, Type IMyostatinReceptors, Transforming Growth Factor betaReceptors, Interleukin-1 Type IIBone Morphogenetic Protein Receptors, Type IIInhibinsInhibin-beta SubunitsFollistatinTransforming Growth Factor betaReceptors, Growth FactorProtein-Serine-Threonine KinasesSmad2 ProteinSignal TransductionBone Morphogenetic ProteinsSmad ProteinsBone Morphogenetic Protein Receptors, Type IRNA, MessengerReceptors, Interleukin-1Receptors, Tumor Necrosis Factor, Type IICells, CulturedGrowth Differentiation FactorsSmad7 ProteinTransforming Growth Factor beta1Receptors, AngiotensinMolecular Sequence DataSmad3 ProteinReverse Transcriptase Polymerase Chain ReactionCell Line