Neural PlateOrganizers, EmbryonicNucleolus Organizer RegionXenopus ProteinsEmbryonic InductionEctodermBody PatterningGastrulaNervous SystemGene Expression Regulation, DevelopmentalNeural CrestGoosecoid ProteinEmbryo, NonmammalianHomeodomain ProteinsOtx Transcription FactorsZebrafish ProteinsIn Situ HybridizationXenopusBone Morphogenetic ProteinsNotochordZebrafishMesodermXenopus laevisGrowth PlateRhombencephalonChick EmbryoMorphogenesisNeurulationBone PlatesNeural TubeProsencephalonFibroblast Growth Factor 8Central Nervous SystemTissue TransplantationWnt ProteinsTranscription FactorsEmbryonic StructuresSilver StainingMesencephalonHeadHMGB ProteinsBone Morphogenetic Protein 4Genes, HomeoboxFibroblast Growth FactorsAxisNodal ProteinGastrulationEmbryologyNerve Tissue ProteinsSOXB1 Transcription FactorsDiencephalonSignal TransductionBlastulaQuailEndodermPaired Box Transcription FactorsMolecular Sequence DataHedgehog ProteinsGerm LayersTelencephalonIntercellular Signaling Peptides and ProteinsChordata, NonvertebrateLIM-Homeodomain ProteinsTrans-ActivatorsAmino Acid SequenceSomitesProteinsCell DifferentiationBlastodermFetal ProteinsDNA-Binding ProteinsPAX2 Transcription FactorRepressor ProteinsCell LineageSequence Homology, Amino AcidWnt1 ProteinHydraAvian ProteinsMicroinjectionsEmbryonic DevelopmentBase SequenceWnt3 ProteinAnimals, Genetically ModifiedEpidermisNodal Signaling LigandsVertebratesMSX1 Transcription FactorEyeBone Morphogenetic Protein ReceptorsEye ProteinsGlycoproteinsRNA, MessengerCloning, MolecularCiona intestinalisBlastomeresUrochordataSilverNeuroepithelial CellsPleurodelesBasic Helix-Loop-Helix Transcription Factors