B-LymphocytesPrecursor Cells, B-LymphoidPolycomb-Group ProteinsB-Lymphocyte SubsetsCell DifferentiationGene Rearrangement, B-LymphocyteHematopoietic Stem CellsInterleukin-7Bone Marrow CellsImmunoglobulin Heavy ChainsStem CellsImmunoglobulin Light Chains, SurrogateLeukemia, LymphoidAntigens, CD19Receptors, Antigen, B-CellNeprilysinProtein PrecursorsCell LineageImmunoglobulin mu-ChainsPrecursor B-Cell Lymphoblastic Leukemia-LymphomaTranscription Factor 7-Like 1 ProteinDNA NucleotidylexotransferaseGenes, ImmunoglobulinCells, CulturedImmunoglobulin MMice, Inbred BALB CSpleenMice, Inbred C57BLBone MarrowPhilology, RomanceLymphoid TissueImmunoglobulin Variable RegionPrecursor Cells, T-LymphoidMice, KnockoutAntigens, CDMolecular Sequence DataBasic Helix-Loop-Helix Transcription FactorsBase SequenceT-LymphocytesSignal TransductionThymus GlandMice, TransgenicGerminal CenterAmyloid beta-Protein PrecursorFlow CytometryLymphocyte CooperationImmunologic MemoryEnzyme PrecursorsImmunoglobulin DCell DivisionAmino Acid SequenceCell SeparationImmunophenotypingAntibody-Producing CellsAntibody FormationImmunoglobulinsCell LineClone CellsAntigens, CD40Lymphocyte CountImmunoglobulin GRNA PrecursorsAntigens, Differentiation, B-LymphocyteDendritic CellsPhenotypeCerebellumCell ProliferationB-Cell Activating FactorGene Expression Regulation, DevelopmentalRNA, MessengerInterleukin-4Antibodies, MonoclonalMice, Mutant StrainsMembrane GlycoproteinsMutationCell MovementMice, Inbred StrainsTranscription FactorsCell SurvivalMice, Inbred CBASchwann CellsGene Expression RegulationAntigens, CD5LymphopeniaDNA-Binding ProteinsMembrane ProteinsAntigensLymphoma, B-CellNucleic Acid PrecursorsCell CountImmunohistochemistryMycobacterium lepraemuriumB-Cell Activation Factor ReceptorGenes, RAG-1T-Lymphocyte SubsetsRadiation ChimeraCD8-Positive T-LymphocytesAntigens, CD45ApoptosisTime Factors