VertebratesZebrafishZebrafish ProteinsEmbryo, NonmammalianGene Expression Regulation, DevelopmentalXenopus ProteinsBody PatterningEmbryonic DevelopmentXenopus laevisMolecular Sequence DataGastrulaNodal ProteinIn Situ HybridizationXenopusBlastulaNeural TubeHomeodomain ProteinsMorphogenesisAmino Acid SequenceMesodermAnimals, Genetically ModifiedSignal TransductionGenes, HomeoboxTranscription FactorsGastrulationOryziasBase SequenceMetamorphosis, BiologicalSequence Homology, Amino AcidChick EmbryoNeural CrestSomitesAphanizomenonEndodermWnt ProteinsConserved SequenceRhombencephalonEvolution, MolecularEctodermNervous SystemGATA5 Transcription FactorEmbryonic InductionHedgehog ProteinsOrganogenesisBone Morphogenetic ProteinsSequence AlignmentGoosecoid ProteinNotochordCentral Nervous SystemMutationCloning, MolecularFibroblast Growth Factor 8Models, BiologicalEmbryo, MammalianCiliaVeratrum AlkaloidsDrosophilaOligonucleotides, AntisenseDNA-Binding ProteinsTrans-ActivatorsDrosophila ProteinsLimb BudsEmbryonic and Fetal DevelopmentActivinsExtremitiesGenomeCell DifferentiationMammalsDNA, ComplementaryPhenotypeRNA, MessengerFibroblast Growth FactorsChordata, NonvertebrateRepressor ProteinsReceptors, Thyroid HormoneTretinoinFishesReceptors, NotchCell PolarityT-Box Domain ProteinsBiological EvolutionLampreysCell LineageDNA PrimersEyeIntercellular Signaling Peptides and ProteinsGene Knockdown TechniquesTransforming Growth Factor betaCell MovementMicroinjectionsTranscription, GeneticBone Morphogenetic Protein 4MutagenesisHagfishesReptilesNuclear ProteinsNerve Tissue ProteinsReverse Transcriptase Polymerase Chain ReactionInvertebratesPhylogeny