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 ProteinsRNA, MessengerBone Morphogenetic Protein Receptors, Type IReceptors, Interleukin-1Cells, CulturedReceptors, Tumor Necrosis Factor, Type IIGrowth Differentiation FactorsSmad7 ProteinAmino Acid SequenceTransforming Growth Factor beta1Receptors, AngiotensinBase SequenceMolecular Sequence DataCell LineReverse Transcriptase Polymerase Chain ReactionSmad3 ProteinGene Expression