Circadian ClocksCLOCK ProteinsCircadian RhythmBiological ClocksPeriod Circadian ProteinsARNTL Transcription FactorsCryptochromesPhotoperiodCircadian Rhythm Signaling Peptides and ProteinsSuprachiasmatic NucleusLightNuclear Receptor Subfamily 1, Group D, Member 1FlavoproteinsDarknessFeedback, PhysiologicalGene Expression RegulationTranscription FactorsArabidopsisChronobiology DisordersArabidopsis ProteinsGene Expression Regulation, PlantCasein Kinase IepsilonPhotoreceptor Cells, InvertebrateBasic Helix-Loop-Helix Transcription FactorsDrosophila ProteinsSynechococcusNuclear ProteinsNeurospora crassaActivity CyclesMelatoninLight Signal TransductionTranscription, GeneticMotor ActivityMutationE-Box ElementsPineal GlandCasein Kinase IdeltaModels, BiologicalRNA, MessengerJet Lag SyndromeDrug ChronotherapyCell Cycle ProteinsTrans-ActivatorsOscillometryMammalsMolecular Sequence DataPeriodicityDrosophilaNeurosporaDrosophila melanogasterTime FactorsArylalkylamine N-AcetyltransferaseFlowersHypocotylReverse Transcriptase Polymerase Chain ReactionLuciferasesGenes, PlantEye ProteinsAmino Acid SequenceDiapause, InsectPromoter Regions, GeneticPhytochromeTemperatureAnimals, Genetically ModifiedSignal TransductionCyanobacteriaPhotobiologyNIH 3T3 CellsPhytochrome BDNA-Binding ProteinsRNA, PlantMice, Inbred C57BLNuclear Receptor Subfamily 1, Group F, Member 1In Situ HybridizationLuminescenceBase SequenceBehavior, AnimalChronobiology PhenomenaCasein Kinase IGene Expression ProfilingLiverRod OpsinsNeuropeptidesPlants, Genetically ModifiedFeedbackPhenotypeSleep Disorders, Circadian RhythmPhosphorylationCells, CulturedChronotherapyMice, KnockoutProtein BiosynthesisBlotting, NorthernCell LineSleepNeuronsMesocricetusInsect ProteinsReceptors, G-Protein-CoupledSolar System