GastrulaEmbryo, NonmammalianXenopus ProteinsOrganizers, EmbryonicEctodermEmbryonic InductionBlastulaMesodermGoosecoid ProteinXenopus laevisGastrulationBody PatterningGene Expression Regulation, DevelopmentalXenopusEndodermPleurodelesZebrafishNervous SystemIn Situ HybridizationZebrafish ProteinsSea UrchinsFetal ProteinsMorphogenesisBone Morphogenetic ProteinsTriturusHomeodomain ProteinsT-Box Domain ProteinsOtx Transcription FactorsNodal ProteinBlastomeresGenes, HomeoboxActivinsUrochordataGerm LayersKillifishesMolecular Sequence DataBlastocystFibroblast Growth FactorsPrimitive StreakSOXF Transcription FactorsBlastodermTissue TransplantationTranscription FactorsChordataEmbryologyAmino Acid SequenceSomitesTailMicroinjectionsBone Morphogenetic Protein 4Chordata, NonvertebrateSignal TransductionBase SequenceCentral Nervous SystemCell LineageCloning, MolecularSalamandridaeSequence Homology, Amino AcidEmbryonic DevelopmentNeural PlateZygoteRhombencephalonNeural CrestRNA, MessengerLIM-Homeodomain ProteinsDNA, ComplementaryDNA-Binding ProteinsInhibinsCypriniformesProteinsLarvaCell MovementBone Morphogenetic Protein ReceptorsEchinodermataIntercellular Signaling Peptides and ProteinsRepressor ProteinsTrans-ActivatorsCell DifferentiationRanidaeHeadAmphibiansOligoribonucleotides, AntisenseChick EmbryoEarly Growth Response Protein 2EpidermisMyogenic Regulatory Factor 5OvumCiona intestinalisAnuraMesencephalonTransplantation, HeterotopicHigh Mobility Group ProteinsMicroscopy, Electron, ScanningGlycoproteinsTransforming Growth Factor betaOryziasStarfishAnimals, Genetically ModifiedProsencephalonCell Transplantation