Circadian ClocksCLOCK ProteinsBiological ClocksCircadian RhythmARNTL Transcription FactorsPeriod Circadian ProteinsSuprachiasmatic NucleusCryptochromesLightPhotoperiodCircadian Rhythm Signaling Peptides and ProteinsBasic Helix-Loop-Helix Transcription FactorsGene Expression RegulationNuclear Receptor Subfamily 1, Group D, Member 1FlavoproteinsDarknessLiverFeedback, PhysiologicalChronobiology DisordersTranscription FactorsPhotoreceptor Cells, InvertebrateArabidopsis ProteinsArabidopsisGene Expression Regulation, PlantDrosophila ProteinsSynechococcusActivity CyclesNuclear ProteinsCasein Kinase IepsilonNeurospora crassaPeripheral NervesMelatoninMotor ActivityE-Box ElementsLight Signal TransductionPineal GlandMutationModels, BiologicalCasein Kinase IdeltaJet Lag SyndromeOscillometryRNA, MessengerTime FactorsTrans-ActivatorsCell Cycle ProteinsDrug ChronotherapyPeriodicityMammalsDrosophilaArylalkylamine N-AcetyltransferaseMice, Inbred C57BLDrosophila melanogasterNeurosporaMolecular Sequence DataTranscription, GeneticFlowersEye ProteinsHypocotylAnimals, Genetically ModifiedPeripheral Nervous SystemDiapause, InsectGenes, PlantLuciferasesChronobiology PhenomenaPeripheral Nervous System DiseasesTemperatureNIH 3T3 CellsPhytochromePhotobiologyCyanobacteriaSignal TransductionBehavior, AnimalNuclear Receptor Subfamily 1, Group F, Member 1LuminescencePhytochrome BPeripheral Vascular DiseasesCasein Kinase IChronotherapyPhenotypeNeuropeptidesMice, KnockoutFeedbackNeuronsRod OpsinsPromoter Regions, GeneticSleepRNA, PlantAmino Acid SequencePhylogenyReceptors, G-Protein-CoupledDNA-Binding ProteinsFeeding BehaviorGene ExpressionPlants, Genetically ModifiedPhosphorylationGene Expression ProfilingInsect ProteinsCells, CulturedSolar SystemLocomotion