Circadian RhythmFeedback, PhysiologicalFeedbackBiological ClocksPeriod Circadian ProteinsCLOCK ProteinsCircadian ClocksSuprachiasmatic NucleusARNTL Transcription FactorsCircadian Rhythm Signaling Peptides and ProteinsSleep Disorders, Circadian RhythmModels, BiologicalCryptochromesSignal TransductionPhotoperiodLightFeedback, PsychologicalGene Expression RegulationTranscription FactorsMelatoninChronobiology DisordersDarknessActivity CyclesTranscription, GeneticJet Lag SyndromePeriodicityMolecular Sequence DataRNA, MessengerOscillometryDrosophila ProteinsComputer SimulationPhosphorylationNeurosporaNuclear ProteinsMutationPromoter Regions, GeneticFeedback, SensoryTime FactorsRepressor ProteinsDNA-Binding ProteinsTrans-ActivatorsBody TemperatureProtein BindingGene Expression Regulation, DevelopmentalMotor ActivityBasic Helix-Loop-Helix Transcription FactorsNuclear Receptor Subfamily 1, Group D, Member 1Cells, CulturedCell LineSleepMice, Inbred C57BLGene Regulatory NetworksMicroRNAsCell Cycle ProteinsPineal GlandCell Line, TumorNeurospora crassaDown-RegulationSuppressor of Cytokine Signaling ProteinsDrosophilaHomeostasisMice, KnockoutBase SequenceStochastic ProcessesAmino Acid SequenceCasein Kinase IepsilonIntracellular Signaling Peptides and ProteinsFlavoproteinsRNA InterferenceArabidopsis ProteinsProto-Oncogene Proteins c-mdm2NeuronsArabidopsisReverse Transcriptase Polymerase Chain ReactionLuciferasesPhototherapyGene Expression Regulation, PlantGene Expression Regulation, FungalModels, GeneticModels, TheoreticalDrosophila melanogasterHEK293 CellsBinding SitesMice, TransgenicChronotherapyProtein-Serine-Threonine KinasesSmad7 ProteinCell NucleusRNA, Small InterferingHydrocortisoneTransfectionHypothalamo-Hypophyseal SystemNIH 3T3 CellsTranscriptional ActivationFungal ProteinsLightingBlotting, WesternProtein Structure, TertiaryGene ExpressionChronobiology Phenomena