Clone CellsIntegrasesRecombinasesDNA NucleotidyltransferasesRad51 RecombinaseRecombination, GeneticVDJ RecombinasesBase SequenceMolecular Sequence DataAttachment Sites, MicrobiologicalMice, TransgenicCloning, MolecularBacteriophage P1Gene TargetingAmino Acid SequenceGenes, RAG-1DNAViral ProteinsPlasmidsTransgenesTransposon ResolvasesGene DeletionRec A RecombinasesImmunoglobulin Joining RegionDNA TopoisomerasesDNA-Binding ProteinsChromosome InversionGenetic EngineeringEscherichia coliGenetic VectorsPolymerase Chain ReactionMutationCell LineDNA, BacterialGene Rearrangement, B-LymphocyteBlotting, SouthernHomeodomain ProteinsGenes, ReporterTransposasesPromoter Regions, GeneticLac OperonSequence Homology, Nucleic AcidChromosomes, Artificial, BacterialSequence Analysis, DNADNA, ComplementaryDNA PrimersGene RearrangementBinding SitesRecombinant Fusion ProteinsGenetic TechniquesDNA Transposable ElementsMice, Inbred C57BLBacterial ProteinsMutagenesis, InsertionalMice, KnockoutGreen Fluorescent ProteinsRNA, MessengerGenes, ImmunoglobulinDNA, Single-StrandedHomologous RecombinationGene ExpressionB-LymphocytesGene Knock-In TechniquesSequence Homology, Amino AcidEmbryo, MammalianTamoxifenbeta-GalactosidasePhenotypeGene Expression RegulationDirected Molecular EvolutionModels, GeneticChromosome PairingGenes, BacterialDNA CleavageBacteriophage lambdaSubstrate SpecificityTransfectionChromosomes, BacterialGene Rearrangement, T-LymphocyteGene Rearrangement, B-Lymphocyte, Light ChainProtein BindingCell LineageTranscription, GeneticCell DifferentiationGenesSequence AlignmentOligodeoxyribonucleotidesDNA, RecombinantCells, CulturedGene Rearrangement, beta-Chain T-Cell Antigen ReceptorRecombinant ProteinsGene Rearrangement, B-Lymphocyte, Heavy ChainBacteriophagesMutagenesisNucleic Acid HybridizationGene Expression Regulation, DevelopmentalRepetitive Sequences, Nucleic AcidOpen Reading FramesImmunoglobulin Variable RegionLuminescent Proteins