BlastulaEmbryo, NonmammalianSea UrchinsGastrulaBlastocystXenopus ProteinsGene Expression Regulation, DevelopmentalBlastomeresXenopusEctodermXenopus laevisMesodermEmbryonic DevelopmentEndodermZebrafishEmbryonic InductionEmbryo, MammalianOvumZebrafish ProteinsBody PatterningNodal Signaling LigandsMorphogenesisCell AggregationMolecular Sequence DataZygotePleurodelesOrganizers, EmbryonicGoosecoid ProteinStrongylocentrotus purpuratusCell DifferentiationActivinsIn Situ HybridizationStarfishCleavage Stage, OvumHemicentrotusBase SequenceGastrulationNotochordTranscription FactorsAmino Acid SequenceVitellinsRNA, MessengerBlastodermEchinodermataCell LineageChick EmbryoFertilizationTranscription Factor 3Embryonic Stem CellsOocytesHomeodomain ProteinsFetal ProteinsMicroinjectionsNodal ProteinMorulaNervous SystemT-Box Domain ProteinsCaenorhabditis elegansBone Morphogenetic ProteinsSignal TransductionTeratomaCarcinoma, EmbryonalMitosisCell NucleusCloning, MolecularTranscription, GeneticTeratocarcinomaLarvaSequence Homology, Amino AcidDNA-Binding ProteinsTime FactorsEmbryonal Carcinoma Stem CellsBenzoylarginine NitroanilideGerm LayersParacentrotusGerm CellsInhibinsCaenorhabditis elegans ProteinsCells, CulturedWnt ProteinsOogenesisNuclear Transfer TechniquesSOXF Transcription FactorsCell CycleCDC2 Protein KinaseAnimals, Genetically ModifiedDNA, ComplementaryCell DivisionCell MovementCell LineCell AdhesionNuclear ProteinsProteinsDNADipterabeta CateninOctamer Transcription Factor-3QuailCytoplasmModels, Biological