Embryonic Stem CellsRegenerationAmbystoma mexicanumExtremitiesStem CellsTurbellariaNotophthalmusAmbystomaNotophthalmus viridescensCell DifferentiationPluripotent Stem CellsForelimbStem Cell TransplantationEmbryo, MammalianOctamer Transcription Factor-3Hematopoietic Stem CellsNerve RegenerationInduced Pluripotent Stem CellsCell LineageLiver RegenerationAdult Stem CellsCell Culture TechniquesSalamandridaeGene Expression Regulation, DevelopmentalCells, CulturedNeural Stem CellsEmbryoid BodiesCell LineMultipotent Stem CellsPlanariansCell ProliferationEmbryo ResearchSOXB1 Transcription FactorsHomeodomain ProteinsStem Cell NicheTeratomaAnimal FinsHematopoietic Stem Cell TransplantationTotipotent Stem CellsMesenchymal Stromal CellsBone RegenerationMesenchymal Stem Cell TransplantationGerm LayersGene Expression ProfilingSignal TransductionReverse Transcriptase Polymerase Chain ReactionEndodermLeukemia Inhibitory FactorStem Cell ResearchCell DedifferentiationTranscription FactorsChimeraTailRegenerative MedicineGene TargetingGene Expression RegulationStem Cell FactorMice, Inbred C57BLNuclear ReprogrammingBlastocystStage-Specific Embryonic AntigensTriturusImmunohistochemistryGreen Fluorescent ProteinsFeeder CellsFlow CytometryMesodermGene ExpressionTissue EngineeringCell SeparationBone Morphogenetic Protein 4TretinoinNeuronsCoculture TechniquesBiological MarkersMyocytes, CardiacHematopoiesisModels, BiologicalGerm CellsTime FactorsFetal Stem CellsZebrafishIn Situ HybridizationCell TransplantationRNA, MessengerMice, TransgenicEpigenesis, GeneticMice, SCIDCell SurvivalEmbryonic DevelopmentBase SequenceAmputationWound HealingUrodelaMolecular Sequence DataPhenotypeMice, KnockoutGuided Tissue RegenerationActivinsWnt Proteins