GastrulationGastrulaZebrafishZebrafish ProteinsVertebratesMesodermWnt ProteinsBody PatterningEmbryo, NonmammalianGene Expression Regulation, DevelopmentalXenopus ProteinsCell PolarityCell MovementXenopusSignal TransductionEctodermEndodermMorphogenesisIn Situ HybridizationXenopus laevisEmbryonic InductionMolecular Sequence DataFetal ProteinsNotochordNodal ProteinAmino Acid SequenceHomeodomain ProteinsEmbryonic DevelopmentGerm LayersBlastulaOrganizers, EmbryonicNervous SystemBone Morphogenetic ProteinsT-Box Domain ProteinsBlastodermPrimitive StreakPleurodelesTranscription FactorsBase SequenceSequence Homology, Amino AcidDrosophila ProteinsChick EmbryoGoosecoid ProteinGenes, HomeoboxDrosophilaChordata, NonvertebrateEmbryonic and Fetal DevelopmentSea UrchinsAmphibiansEvolution, MolecularUrochordataAnimals, Genetically ModifiedNodal Signaling LigandsFibroblast Growth FactorsActivinsBiological EvolutionCell LineageCell DifferentiationSequence AlignmentAvian ProteinsCloning, MolecularLeft-Right Determination FactorsModels, BiologicalHeadOtx Transcription FactorsPhenotypeMutationBlastomeresBone Morphogenetic Protein 4RNA, MessengerInvertebratesTailNeural CrestDNA-Binding ProteinsRhombencephalonZygoteNeural PlateDNA, ComplementaryEmbryo, MammalianChordataFishesLampreysCentral Nervous SystemMorpholinosConserved SequenceProteinsBlastocystLarvaSomitesFrizzled ReceptorsOligonucleotides, AntisenseDrosophila melanogasterIntercellular Signaling Peptides and ProteinsFibroblast Growth Factor 8MicroinjectionsCiona intestinalisHagfishesSalamandridaeOryziasSpecies Specificity