CLOCK ProteinsCircadian RhythmCircadian ClocksBiological ClocksPeriod Circadian ProteinsARNTL Transcription FactorsCryptochromesCircadian Rhythm Signaling Peptides and ProteinsPhotoperiodPeriodicityActivity CyclesLightDarknessNuclear Receptor Subfamily 1, Group D, Member 1Suprachiasmatic NucleusChronobiology DisordersFlavoproteinsSleep Disorders, Circadian RhythmMotor ActivityAlpha RhythmAtrial FibrillationBasic Helix-Loop-Helix Transcription FactorsJet Lag SyndromeFeedback, PhysiologicalChronobiology PhenomenaGene Expression RegulationPhotoreceptor Cells, InvertebrateDrosophila ProteinsOscillometryTranscription FactorsTime FactorsE-Box ElementsSleepElectric CountershockNuclear ProteinsBody TemperatureArylalkylamine N-AcetyltransferaseNeurospora crassaTrans-ActivatorsModels, BiologicalElectrocardiographySynechococcusNeuronsDrug ChronotherapyBehavior, AnimalArabidopsis ProteinsArabidopsisGene Expression Regulation, PlantMutationAnti-Arrhythmia AgentsLight Signal TransductionFeeding BehaviorBeta RhythmChronotherapyLocomotionDrosophilaRNA, MessengerHeart RateCell Cycle ProteinsWakefulnessSomitesPineal GlandCasein Kinase IdeltaDrosophila melanogasterMice, Inbred C57BLAnimals, Genetically ModifiedNeuropeptidesMammalsMelatoninEye ProteinsDelta RhythmArrhythmias, CardiacMoonHeart Conduction SystemCatheter AblationAccelerated Idioventricular RhythmPhylogenySinoatrial NodeLuciferasesHeart AtriaFeedbackTemperatureTranscription, GeneticNuclear Receptor Subfamily 1, Group F, Member 1NIH 3T3 CellsAction PotentialsEvolution, MolecularCardiac Pacing, ArtificialMesocricetusMolecular Sequence DataElectroencephalographyNeurosporaNerve NetAtrial FlutterLuminescenceRod OpsinsBrainPhototherapySeasonsCasein Kinase I