Enhancer Elements, GeneticBase SequenceMolecular Sequence DataPromoter Regions, GeneticTranscription, GeneticTranscription FactorsDNA-Binding ProteinsGene Expression RegulationRegulatory Sequences, Nucleic AcidGenes, RegulatorBinding SitesChloramphenicol O-AcetyltransferaseDeoxyribonuclease ICell LineNuclear ProteinsTransfectionPlasmidsDNASequence Homology, Nucleic AcidRestriction MappingGenes, ReporterGenes, ImmunoglobulinTranscriptional ActivationResponse ElementsDNA Transposable ElementsGene Expression Regulation, DevelopmentalImmunoglobulin kappa-ChainsHeLa CellsCloning, MolecularHomeodomain ProteinsRepetitive Sequences, Nucleic AcidMutationGenesIntronsDNA FootprintingProtein BindingTrans-ActivatorsImmunoglobulin Heavy ChainsMice, TransgenicOligonucleotide ProbesRepressor ProteinsHemicentrotusProto-Oncogene Proteins c-etsCell NucleusSequence DeletionRNA, MessengerImmunoglobulin mu-ChainsTumor Cells, CulturedChromatinRecombinant Fusion ProteinsOligodeoxyribonucleotidesAmino Acid SequenceHelix-Loop-Helix MotifsHIV EnhancerLuciferasesGenes, T-Cell Receptor betaCells, CulturedMutagenesis, Site-DirectedBasic Helix-Loop-Helix Leucine Zipper Transcription FactorsB-LymphocytesProto-Oncogene Protein c-ets-1Transcription Factor 7-Like 1 ProteinDrosophila ProteinsConserved SequenceExonsGlobinsProto-Oncogene ProteinsDrosophilaSimian virus 40Organ SpecificityNF-kappa BRNA, Small NuclearCCAAT-Enhancer-Binding ProteinsDNA PrimersGene Expression Regulation, ViralDNA, ViralGenes, ViralChromosome DeletionDNA Mutational AnalysisConsensus SequenceDrosophila melanogasterbeta-GalactosidaseTransgenesGene Expression Regulation, EnzymologicModels, GeneticElectrophoretic Mobility Shift AssayAnimals, Genetically ModifiedT-LymphocytesLac OperonSp1 Transcription FactorChromosome Mapping3T3 CellsTrace ElementsFinite Element AnalysisGene ExpressionGenes, InsectElementsRegulatory Elements, TranscriptionalInsect HormonesSequence Alignment