Organizers, EmbryonicNucleolus Organizer RegionGoosecoid ProteinBody PatterningEmbryonic InductionGastrulaXenopus ProteinsSilver StainingEmbryologyEmbryo, NonmammalianOtx Transcription FactorsGene Expression Regulation, DevelopmentalZebrafish ProteinsMesodermHomeodomain ProteinsXenopusFibroblast Growth Factor 8Nodal ProteinRhombencephalonNotochordHydraIn Situ HybridizationEctodermWnt ProteinsMesencephalonNodal Signaling LigandsIntercellular Signaling Peptides and ProteinsBone Morphogenetic ProteinsAxisZebrafishHeadXenopus laevisNervous SystemMorphogenesisTissue TransplantationLIM-Homeodomain ProteinsSilverGenes, HomeoboxCell NucleolusSignal TransductionWnt1 ProteinEndodermActivinsLeft-Right Determination FactorsTranscription FactorsCell LineageMetencephalonT-Box Domain ProteinsFetal ProteinsBlastulaFibroblast Growth FactorsProteinsGlycoproteinsBlastodermMolecular Sequence DataChick EmbryoTwins, ConjoinedCell DifferentiationBone Morphogenetic Protein 4Matrix Attachment Region Binding ProteinsRepressor Proteinsbeta CateninSilver NitrateTransforming Growth Factor betaHepatocyte Nuclear Factor 3-betaNeural PlateAmino Acid SequenceTrans-ActivatorsAmphibiansHedgehog ProteinsInhibinsBlastomeresTectum MesencephaliNerve Tissue ProteinsDNA-Binding ProteinsProsencephalonCentral Nervous SystemDrosophila ProteinsMicroinjectionsDrug PackagingDrosophilaChromosomesStaining and LabelingModels, BiologicalEmbryonic DevelopmentVertebratesTailMutationRNA, MessengerCytoskeletal ProteinsFollistatinAnimals, Genetically ModifiedChordataWingBase SequenceHMGB ProteinsGenes, DevelopmentalDNA, RibosomalChordata, NonvertebrateCarrier Proteins