Mice, Inbred AKRAKR murine leukemia virusHydroxyprostaglandin DehydrogenasesMice, Inbred C57BL20-Hydroxysteroid DehydrogenasesAldehyde Reductase3-Hydroxysteroid DehydrogenasesMice, Inbred StrainsMice, TransgenicAnimals, NewbornLeukemia Virus, MurineLeukemia, ExperimentalMice, KnockoutAgingKetosteroidsHydroxysteroid DehydrogenasesCell Differentiation3-alpha-Hydroxysteroid Dehydrogenase (B-Specific)Mice, Inbred BALB CRNA, MessengerBrainStem CellsImmunohistochemistryAlcohol OxidoreductasesGene Expression Regulation, DevelopmentalSpleenCells, CulturedNeuronsNeurogenesisThymus GlandMice, Inbred ICRTestisGene Expression RegulationEmbryo, MammalianBase SequenceIn Situ HybridizationOrgan SpecificityMolecular Sequence DataDisease Models, AnimalDentate GyrusLateral VentriclesAge FactorsCell ProliferationThymus NeoplasmsEpendymaLiverTime FactorsGene ExpressionTissue Distribution