Nodal ProteinNodal Signaling LigandsOrganizers, EmbryonicNucleolus Organizer RegionBlastulaLeft-Right Determination FactorsBody PatterningZebrafish ProteinsEndodermZebrafishMesodermGene Expression Regulation, DevelopmentalEmbryo, NonmammalianBenzodioxolesSignal TransductionTransforming Growth Factor betaGoosecoid ProteinProtein Sorting SignalsEmbryonic InductionGastrulaXenopus ProteinsSilver StainingEmbryologyOtx Transcription FactorsHomeodomain ProteinsXenopusFibroblast Growth Factor 8Molecular Sequence DataRhombencephalonNotochordIn Situ HybridizationHydraWnt ProteinsMesencephalonIntercellular Signaling Peptides and ProteinsAmino Acid SequenceBone Morphogenetic ProteinsHeadEctodermXenopus laevisAxisNervous SystemTranscription FactorsTissue TransplantationLIM-Homeodomain ProteinsSilverCell NucleolusMorphogenesisBase SequenceWnt1 ProteinGenes, HomeoboxProteinsActivinsMetencephalonModels, BiologicalSignal Processing, Computer-AssistedGlycoproteinsMutationRNA, MessengerFibroblast Growth FactorsDNA-Binding ProteinsT-Box Domain ProteinsChick EmbryoFetal ProteinsRepressor ProteinsSequence Homology, Amino AcidBone Morphogenetic Protein 4BlastodermTwins, ConjoinedCloning, MolecularNuclear Localization SignalsMembrane ProteinsCarrier Proteinsbeta CateninHedgehog ProteinsCell DifferentiationMatrix Attachment Region Binding ProteinsTranscription, GeneticSilver NitrateNerve Tissue ProteinsTime FactorsInhibinsHepatocyte Nuclear Factor 3-betaAmphibiansRecombinant Fusion ProteinsCells, CulturedNeural PlateMicroinjectionsTectum MesencephaliCentral Nervous SystemPhosphorylationProsencephalonCytoskeletal ProteinsCell NucleusProtein Structure, TertiaryStaining and LabelingDrosophilaTrans-ActivatorsChromosomesVertebrates