Organizers, EmbryonicNucleolus Organizer RegionGoosecoid ProteinBody PatterningEmbryonic InductionGastrulaXenopus ProteinsSilver StainingEmbryologyProtein Sorting SignalsSignal TransductionGene Expression Regulation, DevelopmentalOtx Transcription FactorsEmbryo, NonmammalianZebrafish ProteinsHomeodomain ProteinsMesodermXenopusFibroblast Growth Factor 8Nodal ProteinRhombencephalonNotochordHydraIn Situ HybridizationZebrafishMesencephalonWnt ProteinsNodal Signaling LigandsIntercellular Signaling Peptides and ProteinsAxisHeadBone Morphogenetic ProteinsEctodermXenopus laevisTissue TransplantationNervous SystemLIM-Homeodomain ProteinsMolecular Sequence DataMorphogenesisSilverCell NucleolusTranscription FactorsWnt1 ProteinGenes, HomeoboxAmino Acid SequenceActivinsLeft-Right Determination FactorsEndodermProteinsMetencephalonBlastulaT-Box Domain ProteinsGlycoproteinsFetal ProteinsFibroblast Growth FactorsBase SequenceTwins, ConjoinedChick EmbryoBlastodermBone Morphogenetic Protein 4Matrix Attachment Region Binding ProteinsRepressor ProteinsTransforming Growth Factor betaDNA-Binding Proteinsbeta CateninSilver NitrateRNA, MessengerModels, BiologicalMutationHedgehog ProteinsHepatocyte Nuclear Factor 3-betaAmphibiansInhibinsTectum MesencephaliNerve Tissue ProteinsNeural PlateSequence Homology, Amino AcidCarrier ProteinsCell DifferentiationProsencephalonMicroinjectionsTrans-ActivatorsCentral Nervous SystemDrug PackagingStaining and LabelingChromosomesCloning, MolecularBlastomeresVertebratesCytoskeletal ProteinsMembrane ProteinsTailChordataFollistatinTranscription, GeneticWingCell LineDNA, RibosomalEmbryonic DevelopmentTime Factors