Neural PlateOrganizers, EmbryonicNucleolus Organizer RegionXenopus ProteinsEctodermOtx Transcription FactorsGastrulaGene Expression Regulation, DevelopmentalBody PatterningProsencephalonEmbryonic InductionNervous SystemHomeodomain ProteinsIn Situ HybridizationEmbryo, NonmammalianZebrafish ProteinsXenopusZebrafishXenopus laevisBone Morphogenetic ProteinsFibroblast Growth Factor 8MorphogenesisTelencephalonGenes, HomeoboxMesencephalonCentral Nervous SystemNeural CrestHeadNerve Tissue ProteinsGoosecoid ProteinPaired Box Transcription FactorsWnt ProteinsEyeEye ProteinsTranscription FactorsFibroblast Growth FactorsNotochordMicroinjectionsMesodermGrowth PlateRhombencephalonRepressor ProteinsChick EmbryoNeurulationBone PlatesSignal TransductionNeural TubeMolecular Sequence DataTrans-ActivatorsTissue TransplantationAmino Acid SequenceSequence Homology, Amino AcidEmbryonic StructuresSilver StainingHMGB ProteinsBone Morphogenetic Protein 4Base SequenceAxisNodal ProteinGastrulationEmbryologySOXB1 Transcription FactorsDiencephalonBlastulaQuailEndodermHedgehog ProteinsGerm LayersIntercellular Signaling Peptides and ProteinsChordata, NonvertebrateLIM-Homeodomain ProteinsSomitesProteinsCell DifferentiationBlastodermFetal ProteinsDNA-Binding ProteinsPAX2 Transcription FactorCell LineageWnt1 ProteinHydraAvian ProteinsEmbryonic DevelopmentWnt3 ProteinAnimals, Genetically ModifiedEpidermisNodal Signaling LigandsVertebratesMSX1 Transcription FactorBone Morphogenetic Protein ReceptorsGlycoproteinsRNA, MessengerCloning, MolecularCiona intestinalisBlastomeresUrochordataSilverNeuroepithelial CellsPleurodelesBasic Helix-Loop-Helix Transcription Factors