Embryonic StructuresGene Expression Regulation, DevelopmentalBody PatterningEmbryo, NonmammalianEmbryo, MammalianZebrafishMesodermIn Situ HybridizationNeoplastic Stem CellsStem CellsCell DifferentiationAntigens, CD24Epithelioid CellsOctamer Transcription Factor-3Cells, CulturedEmbryonic Stem CellsCell LineageSpheroids, CellularCell ProliferationEpithelial CellsPhenotypeSOXB1 Transcription FactorsCell Culture TechniquesMultipotent Stem CellsEpithelial-Mesenchymal TransitionCell SeparationFlow CytometryCell DivisionAntigens, CD44Cell Line, TumorCell LineMice, SCIDBlastocystCell CountTranscription FactorsClone CellsEmbryonic DevelopmentCell MovementImmunohistochemistryCell Transformation, NeoplasticSignal TransductionAntigens, CDBiological MarkersGene Expression RegulationMice, Inbred C57BLGlycoproteinsRegenerationVitellinsGastrulaCell AggregationMesenchymal Stromal CellsGene Expression ProfilingMicroscopy, ElectronFibroblastsRNA, MessengerReverse Transcriptase Polymerase Chain ReactionBlastomeresKeratinsTelomeraseXenopus ProteinsTransplantation, HeterologousCell SurvivalApoptosisTime FactorsCaenorhabditis elegansPeptidesImmunophenotypingMice, NudeGene Expression Regulation, NeoplasticChick EmbryoHematopoietic Stem CellsTeratomaCarcinoma, EmbryonalXenopusMitosisXenopus laevisOvumTumor Cells, CulturedTeratocarcinomaTumor Markers, BiologicalBlastulaMolecular Sequence DataCleavage Stage, OvumEndodermEmbryonal Carcinoma Stem CellsOocytesCaenorhabditis elegans ProteinsNuclear Transfer TechniquesCell CycleCDC2 Protein KinaseStarfishMorphogenesisDipteraSea UrchinsZygoteQuailIridovirusEmbryonic and Fetal DevelopmentUrochordataTotipotent Stem Cells