Organizers, EmbryonicNucleolus Organizer RegionGoosecoid ProteinBody PatterningEmbryonic InductionGastrulaXenopus ProteinsAxisSilver StainingGene Expression Regulation, DevelopmentalEmbryologyEmbryo, NonmammalianOtx Transcription FactorsZebrafish ProteinsHomeodomain ProteinsMesodermXenopusFibroblast Growth Factor 8Nodal ProteinRhombencephalonHydraNotochordZebrafishIn Situ HybridizationWnt ProteinsEctodermNodal Signaling LigandsMesencephalonIntercellular Signaling Peptides and ProteinsBone Morphogenetic ProteinsXenopus laevisHeadMorphogenesisTissue TransplantationNervous SystemLIM-Homeodomain ProteinsGenes, HomeoboxSilverSignal TransductionCell NucleolusWnt1 ProteinTranscription FactorsEndodermActivinsLeft-Right Determination FactorsHypothalamo-Hypophyseal SystemMetencephalonFetal ProteinsBlastulaT-Box Domain ProteinsProteinsBlastodermGlycoproteinsFibroblast Growth FactorsPituitary-Adrenal SystemMolecular Sequence DataChick EmbryoTwins, ConjoinedBone Morphogenetic Protein 4beta CateninMatrix Attachment Region Binding ProteinsTransforming Growth Factor betaRepressor ProteinsAmino Acid SequenceSilver NitrateHepatocyte Nuclear Factor 3-betaInhibinsAmphibiansTrans-ActivatorsTectum MesencephaliHedgehog ProteinsNeural PlateBlastomeresProsencephalonMicroinjectionsRNA, MessengerCentral Nervous SystemModels, BiologicalDNA-Binding ProteinsNerve Tissue ProteinsChromosomesVertebratesDrug PackagingEmbryonic DevelopmentTailStaining and LabelingCytoskeletal ProteinsChordataWingFollistatinHMGB ProteinsBase SequenceChordata, NonvertebrateCell DifferentiationDrosophila ProteinsMutationDrosophilaSomitesBlastocystCarrier Proteins