Period Circadian ProteinsCircadian RhythmDrosophilaDrosophila ProteinsDrosophila melanogasterCLOCK ProteinsARNTL Transcription FactorsBiological ClocksCircadian ClocksCasein Kinase IepsilonAnimals, Genetically ModifiedMutationInsect ProteinsPhotoreceptor Cells, InvertebrateGenome, InsectLarvaNuclear ProteinsPoint MutationCryptochromesMolecular Sequence DataMutation, MissenseTranscription FactorsBase SequenceGenes, InsectAmino Acid SequenceNuclear Receptor Subfamily 1, Group D, Member 1ChromosomesSuprachiasmatic NucleusSelection, GeneticGene Expression RegulationPhotoperiodCircadian Rhythm Signaling Peptides and ProteinsPhenotypeGene Expression Regulation, DevelopmentalFrameshift MutationBasic Helix-Loop-Helix Transcription FactorsWingFlavoproteinsAllelesEmbryo, NonmammalianDNA-Binding ProteinsSequence Homology, Amino AcidLightRNA, MessengerGerm-Line MutationTrans-ActivatorsChronobiology DisordersTranscription, GeneticEye ProteinsCloning, MolecularAmino Acid SubstitutionChromosome MappingGenes, LethalDarknessSignal TransductionPedigreeMutagenesis, Site-DirectedCell Cycle ProteinsInsect HormonesHeterozygoteMutagenesisExonsE-Box ElementsDNA PrimersCrosses, GeneticPolymerase Chain ReactionPupaModels, GeneticGenotypeHomozygoteDNA Mutational AnalysisProtein Structure, TertiaryGene ExpressionEyeCell LineMutation RateDNAProtein BindingPineal GlandSequence AlignmentModels, BiologicalEvolution, MolecularHomeodomain ProteinsSequence Analysis, DNAPromoter Regions, GeneticIn Situ HybridizationBinding SitesBody PatterningMembrane ProteinsRepressor ProteinsPhylogenyJet Lag SyndromeSpecies SpecificityChronobiology PhenomenaMorphogenesisOogenesisTime FactorsModels, MolecularGenetic Complementation TestGenetic Variation