NotochordGenes, HomeoboxHomeodomain ProteinsGene Expression Regulation, DevelopmentalBody PatterningMidline Thalamic NucleiEmbryo, NonmammalianGastrulaIn Situ HybridizationEmbryonic InductionMorphogenesisMesodermZebrafish ProteinsUrochordataFetal ProteinsTelencephalonCiona intestinalisZebrafishNervous SystemEctodermChick EmbryoCentral Nervous SystemTranscription FactorsHedgehog ProteinsChoroid PlexusBone Morphogenetic ProteinsDrosophila ProteinsMolecular Sequence DataNeural CrestXenopus laevisXenopus ProteinsDrosophilaT-Box Domain ProteinsSignal TransductionMesencephalonWnt ProteinsAmino Acid SequenceCell DifferentiationSomitesMutationPhenotypeCell MovementTailHepatocyte Nuclear Factor 3-betaOrganizers, EmbryonicGoosecoid ProteinChordata, NonvertebrateEndodermBase SequenceLIM-Homeodomain ProteinsNeuronsTrans-ActivatorsGranuloma, Lethal MidlineSequence Homology, Amino AcidNerve Tissue ProteinsAvian ProteinsEmbryonic and Fetal DevelopmentDNA-Binding ProteinsDiencephalonQuailAnimals, Genetically ModifiedEmbryo, MammalianOtx Transcription FactorsAxonsSpineCoturnixChordomaChordataEmbryonic DevelopmentCloning, MolecularRNA, MessengerGene ExpressionCell LineageGastrulationBone Morphogenetic Protein 4DNA, ComplementaryBlastomeresLarvaHeadRepressor ProteinsRhombencephalonVertebratesImmunohistochemistrySpinal CordNodal ProteinFetal Tissue TransplantationMSX1 Transcription FactorAntennapedia Homeodomain ProteinExtremitiesTissue TransplantationDNA PrimersProteinsPhylogenyNuclear ProteinsOptic ChiasmHoloprosencephalyMice, Mutant StrainsProsencephalonGenes, InsectFibroblast Growth Factors