NotochordOrganizers, EmbryonicNucleolus Organizer RegionEmbryonic InductionGoosecoid ProteinGastrulaBody PatterningFetal ProteinsUrochordataCiona intestinalisEmbryo, NonmammalianGene Expression Regulation, DevelopmentalMesodermXenopus ProteinsZebrafishZebrafish ProteinsIn Situ HybridizationT-Box Domain ProteinsSilver StainingMorphogenesisHomeodomain ProteinsEmbryologySomitesXenopusNervous SystemChick EmbryoHepatocyte Nuclear Factor 3-betaTailXenopus laevisEctodermNodal ProteinHedgehog ProteinsOtx Transcription FactorsEndodermAxisBone Morphogenetic ProteinsTissue TransplantationChordata, NonvertebrateFibroblast Growth Factor 8Wnt ProteinsTranscription FactorsRhombencephalonNodal Signaling LigandsCentral Nervous SystemIntercellular Signaling Peptides and ProteinsHeadMesencephalonMolecular Sequence DataLIM-Homeodomain ProteinsChordataSignal TransductionGenes, HomeoboxQuailLeft-Right Determination FactorsBlastomeresHydraCoturnixActivinsProteinsFibroblast Growth FactorsAmino Acid SequenceTrans-ActivatorsBone Morphogenetic Protein 4GastrulationBlastulaCell DifferentiationWnt1 ProteinSpineEmbryonic DevelopmentChordomaBlastodermAnimals, Genetically ModifiedSilverDNA-Binding ProteinsSequence Homology, Amino AcidCell NucleolusBase SequenceGlycoproteinsMutationCell LineageLarvaEmbryonic and Fetal DevelopmentNeural PlateVertebratesTransforming Growth Factor betaFetal Tissue TransplantationInhibinsRNA, MessengerNeural CrestEmbryo, Mammalianbeta CateninMetencephalonRepressor ProteinsPaired Box Transcription Factors