Gene DosageMolecular Sequence DataBase SequenceDosage Compensation, GeneticMutationAmino Acid SequenceMice, TransgenicRNA, MessengerGene ExpressionPhenotypeGene Expression RegulationTranscription, GeneticCloning, MolecularTranscription FactorsPromoter Regions, GeneticRibosomal ProteinsPlasmidsDNA-Binding ProteinsGenesTransfectionReverse Transcriptase Polymerase Chain ReactionSignal TransductionCell LineAllelesGene DeletionSaccharomyces cerevisiaeCarrier ProteinsPolymerase Chain ReactionMice, Inbred C57BLDosage FormsCell Line, TumorImmunohistochemistryGene DuplicationGenes, FungalHeterozygoteBlotting, WesternGene AmplificationGene Expression Regulation, DevelopmentalDNA PrimersGenotypeGenes, BacterialCells, CulturedNuclear ProteinsMembrane ProteinsGene Expression Regulation, NeoplasticEscherichia coliUbiquitin ThiolesteraseChromosome MappingApoptosisSequence Homology, Amino AcidBacterial ProteinsDNAX Chromosome InactivationUp-RegulationMice, KnockoutHomozygoteGene Expression ProfilingHaploinsufficiencyDown SyndromeRepressor ProteinsGene Expression Regulation, FungalSequence Analysis, DNAX ChromosomeBlotting, NorthernSaccharomyces cerevisiae ProteinsCell ProliferationMultigene FamilyRecombinant ProteinsGenetic VectorsIn Situ Hybridization, FluorescenceProtein BindingRestriction MappingPhylogenyFungal ProteinsTrisomyTransgenesOligonucleotide Array Sequence AnalysisAneuploidyChromosomes, Human, Pair 21Suppression, GeneticCell DivisionDisease Models, AnimalDrosophila ProteinsGene Expression Regulation, PlantTrans-ActivatorsHomeodomain ProteinsProteinsNerve Tissue ProteinsRecombinant Fusion ProteinsCell DifferentiationExonsNucleic Acid HybridizationRNA, Small InterferingPlants, Genetically ModifiedSequence DeletionGenes, RegulatorBlotting, SouthernThiolester HydrolasesTime FactorsDrosophila melanogaster