GastrulaEmbryo, NonmammalianXenopus ProteinsOrganizers, EmbryonicMolecular Sequence DataEctodermEmbryonic InductionBlastulaMesodermGoosecoid ProteinBase SequenceXenopus laevisGene Expression Regulation, DevelopmentalAmino Acid SequenceGastrulationBody PatterningXenopusCloning, MolecularSequence Analysis, DNAEndodermPleurodelesZebrafishNervous SystemIn Situ HybridizationSea UrchinsZebrafish ProteinsPhylogenyMorphogenesisFetal ProteinsSequence Homology, Amino AcidBone Morphogenetic ProteinsHomeodomain ProteinsTriturusT-Box Domain ProteinsOtx Transcription FactorsSequence AlignmentDNA, ComplementaryNodal ProteinGenes, HomeoboxSequence Homology, Nucleic AcidBlastomeresUrochordataActivinsKillifishesTranscription FactorsGerm LayersBlastocystRNA, MessengerFibroblast Growth FactorsGene LibraryPrimitive StreakPolymerase Chain ReactionSOXF Transcription FactorsBlastodermGenes, BacterialTissue TransplantationMutationChordataDNA PrimersEmbryologyEvolution, MolecularSomitesChordata, NonvertebrateSignal TransductionTailMicroinjectionsBone Morphogenetic Protein 4Genome, BacterialSpecies SpecificityOpen Reading FramesProteinsTranscription, GeneticDNADNA-Binding ProteinsCentral Nervous SystemCell LineageDNA, BacterialGenetic VariationEmbryonic DevelopmentSalamandridaeLarvaNeural PlateGenesZygoteRhombencephalonRestriction MappingRepressor ProteinsNeural CrestGene ExpressionConserved SequenceLIM-Homeodomain ProteinsMultigene FamilyInhibinsCypriniformesTrans-ActivatorsCell MovementIntercellular Signaling Peptides and ProteinsBone Morphogenetic Protein ReceptorsChick EmbryoEchinodermata