Xenopus laevisXenopusXenopus ProteinsOocytesEmbryo, NonmammalianMetamorphosis, BiologicalMolecular Sequence DataOvumAmino Acid SequenceMicroinjectionsGastrulaBase SequenceLarvaGene Expression Regulation, DevelopmentalCloning, MolecularRNA, MessengerVitellogeninsBlastulaRNA, ComplementarySequence Homology, Amino AcidIn Situ HybridizationEmbryonic InductionMesodermEctodermDNA, ComplementaryDNAOogenesisCell ExtractsTranscription, GeneticSequence AlignmentMelanophoresRNA, Ribosomal, 5STranscription Factor TFIIIABody PatterningCarrier ProteinsRNANervous SystemMorphogenesisNucleoplasminsTranscription FactorsKineticsAnimals, Genetically ModifiedRNA, RibosomalGene ExpressionBiological TransportTailRecombinant ProteinsMembrane PotentialsNotochordProtein BiosynthesisTime FactorsSequence Homology, Nucleic AcidCell NucleusSpecies SpecificitySymportersActivinsElectrophysiologyAmphibiansGenesDNA-Binding ProteinsHomeodomain ProteinsPoly AMaturation-Promoting FactorZygotePlasmidsBlastomeresGene LibraryNucleic Acid HybridizationEgg ProteinsMutationFertilizationSignal TransductionGastrulationBlotting, NorthernEmbryonic DevelopmentGene Expression RegulationSodiumDNA PrimersVitelline MembraneT-Box Domain ProteinsNuclear ProteinsPhylogenyBinding SitesRecombinant Fusion ProteinsAnuraProtein BindingModels, BiologicalProteinsMeiosisOligonucleotides, AntisenseNeural CrestIon Channel GatingMicroscopy, ElectronBone Morphogenetic ProteinsCell MembraneThyroid HormonesReverse Transcriptase Polymerase Chain ReactionDose-Response Relationship, DrugEndodermMembrane Proteins