MesodermChick EmbryoGene Expression Regulation, DevelopmentalMorphogenesisHeartGastrulaEmbryonic InductionSomitesEctodermBody PatterningEmbryo, NonmammalianXenopus ProteinsFetal ProteinsIn Situ HybridizationT-Box Domain ProteinsGastrulationZebrafish ProteinsXenopusHomeodomain ProteinsZebrafishBone Morphogenetic ProteinsNodal ProteinActivinsTranscription FactorsXenopus laevisBone Morphogenetic Protein 4Goosecoid ProteinGenes, HomeoboxCoturnixQuailFibroblast Growth FactorsCell DifferentiationNodal Signaling LigandsSignal TransductionNervous SystemTwist Transcription FactorWnt ProteinsEmbryonic and Fetal DevelopmentDrosophilaPrimitive StreakDrosophila ProteinsFibroblast Growth Factor 8Molecular Sequence DataCell LineageGerm LayersEmbryonic DevelopmentNeural CrestExtremitiesLimb BudsTailHeadInhibinsDNA-Binding ProteinsEmbryo, MammalianBasic Helix-Loop-Helix Transcription FactorsTissue TransplantationBranchial RegionTrans-ActivatorsVisceraAvian ProteinsBase SequenceAmino Acid SequenceBlastodermTransforming Growth Factor betaLeft-Right Determination FactorsReceptors, Fibroblast Growth FactorAnimals, Genetically ModifiedMyogenic Regulatory Factor 5Embryonic Stem CellsProteinsBlastulaGenes, InsectCell MovementHedgehog ProteinsReceptors, NotchMyoD Protein