MesodermSomitesFetal ProteinsGastrulaGene Expression Regulation, DevelopmentalCell DifferentiationT-Box Domain ProteinsBody PatterningIn Situ HybridizationReceptors, NotchBasic Helix-Loop-Helix Transcription FactorsZebrafishZebrafish ProteinsAvian ProteinsGlycosyltransferasesChick EmbryoEmbryo, NonmammalianBiological ClocksEmbryonic InductionMorphogenesisTranscription FactorsXenopus ProteinsHomeodomain ProteinsTailHelix-Loop-Helix MotifsSignal TransductionReceptor, EphA4Wnt ProteinsEmbryo, MammalianMyoD ProteinEmbryonic DevelopmentMyogenic Regulatory Factor 5Embryonic and Fetal DevelopmentMolecular Sequence DataEctodermWnt3A ProteinFibroblast Growth Factor 8Wnt3 ProteinNotochordCoturnixFibroblast Growth FactorsDNA-Binding ProteinsMembrane ProteinsXenopusBase SequencePaired Box Transcription FactorsIntracellular Signaling Peptides and ProteinsTrans-ActivatorsAmino Acid SequenceRNA, MessengerSpineTretinoinReceptor, Notch1Cell LineageModels, BiologicalMice, TransgenicVertebratesCleavage Stage, OvumProteinsQuailBone Morphogenetic ProteinsMice, Mutant StrainsRepressor ProteinsSequence Homology, Amino AcidStem CellsCloning, MolecularAnimals, Genetically ModifiedBone Morphogenetic Protein 4MutationXenopus laevisDNA, ComplementaryMice, KnockoutNeural CrestEmbryonic Stem CellsDNA PrimersCells, CulturedBranchial RegionTime FactorsGenes, HomeoboxTranscription, GeneticNodal ProteinNervous SystemGenes, ReporterGastrulationHeadActivinsMuscle DevelopmentPhenotypeGene ExpressionCell LineImmunohistochemistrySex DifferentiationExtremitiesCell DivisionGene Expression RegulationReverse Transcriptase Polymerase Chain ReactionTransforming Growth Factor betaCell ProliferationCell MovementCentral Nervous System