EndodermMesodermOrganizers, EmbryonicNucleolus Organizer RegionGastrulaEmbryonic InductionBody PatterningGene Expression Regulation, DevelopmentalGoosecoid ProteinXenopus ProteinsEctodermEmbryo, NonmammalianIn Situ HybridizationHomeodomain ProteinsZebrafish ProteinsNodal ProteinMorphogenesisSOXF Transcription FactorsFetal ProteinsSomitesXenopusT-Box Domain ProteinsZebrafishActivinsBone Morphogenetic ProteinsChick EmbryoTranscription FactorsGerm LayersCell DifferentiationOtx Transcription FactorsGastrulationXenopus laevisGenes, HomeoboxFibroblast Growth Factor 8Wnt ProteinsBone Morphogenetic Protein 4Signal TransductionFibroblast Growth FactorsVisceraHeadCell LineageHepatocyte Nuclear Factor 3-betaSilver StainingNervous SystemNodal Signaling LigandsTissue TransplantationQuailCoturnixEmbryonic DevelopmentEmbryo, MammalianEmbryologyNotochordEmbryonic and Fetal DevelopmentLeft-Right Determination FactorsBlastulaDigestive SystemMolecular Sequence DataGATA5 Transcription FactorEmbryonic Stem CellsGATA6 Transcription FactorDNA-Binding ProteinsRhombencephalonIntercellular Signaling Peptides and ProteinsTrans-ActivatorsYolk SacHMGB ProteinsSOX Transcription FactorsBlastodermBlastocystLIM-Homeodomain ProteinsTransforming Growth Factor betaPrimitive StreakProteinsInhibinsBranchial RegionDrosophilaAmino Acid SequenceBase SequenceGATA Transcription FactorsAxisTailDrosophila ProteinsHedgehog ProteinsNeural CrestWnt1 ProteinGATA4 Transcription FactorChimeraHydraRNA, MessengerBlastomeresVertebratesAnimals, Genetically ModifiedModels, BiologicalMesencephalonRepressor ProteinsAvian ProteinsHigh Mobility Group ProteinsTretinoinStem Cellsbeta Catenin