EndodermGastrulationGastrulaMesodermEmbryo, NonmammalianGene Expression Regulation, DevelopmentalBody PatterningEctodermXenopus ProteinsEmbryonic InductionZebrafish ProteinsZebrafishSOXF Transcription FactorsMorphogenesisGerm LayersIn Situ HybridizationNodal ProteinFetal ProteinsNotochordBlastulaHomeodomain ProteinsXenopus laevisXenopusEmbryonic DevelopmentT-Box Domain ProteinsPrimitive StreakCell DifferentiationBone Morphogenetic ProteinsActivinsWnt ProteinsSOX Transcription FactorsSignal TransductionEmbryonic and Fetal DevelopmentVisceraBlastodermTranscription FactorsHepatocyte Nuclear Factor 3-betaOrganizers, EmbryonicCell LineageGoosecoid ProteinGATA6 Transcription FactorGATA5 Transcription FactorEmbryo, MammalianDigestive SystemBlastocystCell MovementSea UrchinsChick EmbryoNervous SystemPleurodelesMolecular Sequence DataOtx Transcription FactorsBone Morphogenetic Protein 4Fibroblast Growth FactorsEmbryonic Stem CellsYolk SacLeft-Right Determination FactorsGenes, HomeoboxBlastomeresAmino Acid SequenceHigh Mobility Group ProteinsUrochordataHeadChimeraHMGB ProteinsGATA4 Transcription FactorDNA-Binding ProteinsBase SequenceSomitesCell PolarityZygoteDrosophila ProteinsDrosophilaModels, BiologicalTransforming Growth Factor betaRNA, MessengerNodal Signaling LigandsQuailTrans-ActivatorsBranchial RegionPhenotypeGATA Transcription FactorsSequence Homology, Amino AcidCoturnixProteinsAnimals, Genetically ModifiedOrganogenesisTailTretinoinMutationNeural PlateNeural CrestStem CellsIntercellular Signaling Peptides and ProteinsOligonucleotides, AntisenseFibroblast Growth Factor 8Avian ProteinsMicroinjectionsHepatocyte Nuclear Factor 3-gammaVertebrates