Promoter Regions, GeneticChloramphenicolChloramphenicol O-AcetyltransferaseBase SequenceTranscription, GeneticMolecular Sequence DataGene Expression RegulationTransfectionDNA-Binding ProteinsChloramphenicol ResistanceTranscription FactorsSp1 Transcription FactorLuciferasesGenes, ReporterCell LineRNA, MessengerImmunoglobulin Variable RegionBinding SitesResponse ElementsPlasmidsTranscriptional ActivationDNACells, CulturedNuclear ProteinsGene Expression Regulation, EnzymologicGenes, ImmunoglobulinTumor Cells, CulturedMutationImmunoglobulin Constant RegionsImmunoglobulin Heavy ChainsCloning, MolecularTrans-ActivatorsRegulatory Sequences, Nucleic AcidGene ExpressionRecombinant Fusion ProteinsEnhancer Elements, GeneticGenesAmino Acid SequenceReverse Transcriptase Polymerase Chain ReactionCell Line, TumorSequence Homology, Nucleic AcidElectrophoretic Mobility Shift AssayHomeodomain ProteinsProtein BindingRestriction MappingSignal TransductionEscherichia coliColforsinImmunoglobulin kappa-ChainsDNA PrimersCorticotropin-Releasing HormoneDNA FootprintingCell DifferentiationTATA BoxAcetyltransferasesImmunoglobulin Light ChainsTranscription Initiation SiteHeLa CellsSequence DeletionRepressor ProteinsDNA MethylationCyclic AMPEnzyme Inhibitors5' Flanking RegionSp3 Transcription FactorPolymerase Chain ReactionChromatin ImmunoprecipitationThiamphenicolBacterial ProteinsDeoxyribonuclease IGene Expression Regulation, BacterialConsensus SequenceMutagenesis, Site-DirectedAnti-Bacterial AgentsGene Rearrangement, B-Lymphocyte, Heavy ChainDrug Resistance, MicrobialGene Expression Regulation, ViralExonsGenes, RegulatorCell NucleusB-LymphocytesCCAAT-Enhancer-Binding ProteinsDNA, BacterialOperonTranscription Factor AP-1Sequence Analysis, DNAGenes, Bacterialbeta-GalactosidaseGenetic VectorsAntibody DiversityDNA, RecombinantImmunoglobulin J-ChainsImmunoglobulin lambda-ChainsUpstream Stimulatory FactorsInsulinGene Rearrangement, B-LymphocyteBlotting, SouthernImmunoglobulin IdiotypesOligodeoxyribonucleotidesTetracycline