Stem Cell TransplantationRegenerationStem CellsHematopoietic Stem CellsEmbryonic Stem CellsAdult Stem CellsPluripotent Stem CellsHematopoietic Stem Cell TransplantationStem Cell NicheNeural Stem CellsInduced Pluripotent Stem CellsCell DifferentiationMultipotent Stem CellsMesenchymal Stem Cell TransplantationStem Cell FactorMesenchymal Stromal CellsCell LineageStem Cell ResearchPlant StemsFetal Stem CellsCell ProliferationCells, CulturedHematopoietic Stem Cell MobilizationNeoplastic Stem CellsBone Marrow CellsOctamer Transcription Factor-3Cell Culture TechniquesRegenerative MedicineCell SeparationTransplantation, AutologousHematopoiesisPeripheral Blood Stem Cell TransplantationTotipotent Stem CellsAntigens, CD34Transplantation, HomologousFlow CytometryMice, Inbred C57BLEmbryo, MammalianSOXB1 Transcription FactorsSpermatogoniaSignal TransductionColony-Forming Units Assay