Organizers, EmbryonicNucleolus Organizer RegionGoosecoid ProteinBody PatterningEmbryonic InductionGastrulaXenopus ProteinsSilver StainingEmbryologyGene Expression Regulation, DevelopmentalOtx Transcription FactorsEmbryo, NonmammalianZebrafish ProteinsHomeodomain ProteinsMesodermXenopusFibroblast Growth Factor 8Nodal ProteinRhombencephalonNotochordHydraMesencephalonZebrafishNodal Signaling LigandsAxisHeadIntercellular Signaling Peptides and ProteinsIn Situ HybridizationWnt ProteinsEctodermXenopus laevisBone Morphogenetic ProteinsTissue TransplantationNervous SystemLIM-Homeodomain ProteinsMorphogenesisSilverCell NucleolusGenes, HomeoboxWnt1 ProteinActivinsLeft-Right Determination FactorsTranscription FactorsSignal TransductionEndodermMetencephalonBlastulaFetal ProteinsT-Box Domain ProteinsMolecular Sequence DataGlycoproteinsProteinsTwins, ConjoinedFibroblast Growth FactorsBlastodermMatrix Attachment Region Binding ProteinsChick EmbryoBone Morphogenetic Protein 4Silver NitrateAmino Acid SequenceTransforming Growth Factor betabeta CateninHepatocyte Nuclear Factor 3-betaAmphibiansRepressor ProteinsInhibinsTectum MesencephaliTrans-ActivatorsNeural PlateHedgehog ProteinsDrug PackagingProsencephalonChromosomesStaining and LabelingMicroinjectionsNerve Tissue ProteinsDNA, RibosomalCentral Nervous SystemBlastomeresDNA-Binding ProteinsVertebratesBase SequenceChordataFollistatinTailRNA, MessengerModels, BiologicalGenes, DevelopmentalCytoskeletal ProteinsChordata, NonvertebrateCell DifferentiationCarrier ProteinsEmbryonic DevelopmentMutationRNA, RibosomalHMGB ProteinsCell LineageBlastocystWingSequence Homology, Amino Acid