EctodermEndodermGastrulaEmbryonic InductionMesodermGene Expression Regulation, DevelopmentalPhenotypeMorphogenesisEmbryonic and Fetal DevelopmentPolycomb Repressive Complex 2Embryo, NonmammalianBody PatterningChimeraIn Situ HybridizationCell DifferentiationBlastocystEmbryo, MammalianBone Morphogenetic ProteinsTranscription FactorsCulture TechniquesSOXF Transcription FactorsXenopus laevisMolecular Sequence DataSignal TransductionGerm LayersDrosophila ProteinsDNA-Binding ProteinsXenopus ProteinsHomeodomain ProteinsNodal ProteinChick EmbryoNervous SystemBone Morphogenetic Protein 4VisceraZebrafish ProteinsCell LineageSea UrchinsMutationGATA6 Transcription FactorGastrulationDigestive SystemBlastulaEmbryonic Stem CellsNeural CrestFibroblast Growth FactorsNotochordHepatocyte Nuclear Factor 3-betaEmbryonic DevelopmentOtx Transcription FactorsZebrafishGATA5 Transcription FactorEmbryonic StructuresXenopusActivinsHMGB ProteinsBranchial RegionSOX Transcription FactorsBase SequenceYolk SacQuailGenes, HomeoboxHigh Mobility Group ProteinsWnt ProteinsFibroblast Growth Factor 8T-Box Domain ProteinsFetal ProteinsAmino Acid SequenceTrans-ActivatorsTissue TransplantationNeural PlateGATA Transcription FactorsFibroblast Growth Factor 4HeadRNA, MessengerHedgehog ProteinsGATA4 Transcription FactorExtremitiesModels, BiologicalCoturnixStem CellsOrganizers, EmbryonicMice, TransgenicSOXB1 Transcription FactorsPaired Box Transcription FactorsTretinoinDrosophilaTeratomaProteinsGene ExpressionImmunohistochemistryDNA PrimersMice, Mutant StrainsTransforming Growth Factor betaStrongylocentrotus purpuratusLimb BudsSomitesAnimals, Genetically ModifiedCells, CulturedBlastodermRepressor Proteins