Gene Expression Regulation, DevelopmentalOrganizers, EmbryonicZebrafish ProteinsNucleolus Organizer RegionEmbryo, NonmammalianGoosecoid ProteinBody PatterningEmbryonic InductionAnimals, Genetically ModifiedGastrulaIn Situ HybridizationXenopus ProteinsSilver StainingHomeodomain ProteinsRhombencephalonEmbryologyOtx Transcription FactorsMesodermNotochordNodal Signaling LigandsMorphogenesisMorpholinosFibroblast Growth Factor 8Molecular Sequence DataXenopusWnt ProteinsBone Morphogenetic ProteinsLarvaNervous SystemMesencephalonSignal TransductionTranscription FactorsEctodermIntercellular Signaling Peptides and ProteinsHeadNodal ProteinAmino Acid SequenceEmbryonic DevelopmentAxisHydraBlastulaSomitesXenopus laevisLIM-Homeodomain ProteinsZebrafishEndodermGenes, HomeoboxMutationAnimal FinsTissue TransplantationLeft-Right Determination FactorsT-Box Domain ProteinsLateral Line SystemSilverFibroblast Growth FactorsHypoxanthineSequence Homology, Amino AcidBase SequenceHedgehog ProteinsGreen Fluorescent ProteinsCell NucleolusGastrulationOligonucleotides, AntisenseWnt1 ProteinPhenotypeMitotaneFetal ProteinsTailRNA, MessengerMetencephalonCloning, MolecularBlastodermPhylogenyTrans-ActivatorsVertebratesActivinsProteinsCentral Nervous SystemNerve Tissue ProteinsCell DifferentiationGlycoproteinsBone Morphogenetic Protein 4ProsencephalonDiencephalonOptic FlowCell Lineagebeta CateninDNA-Binding ProteinsOrganogenesisRepressor ProteinsRegenerationSequence AlignmentNeural CrestModels, BiologicalFibroblast Growth Factor 3Chick EmbryoNeural PlateTwins, ConjoinedReceptors, NotchDNA, Complementary