Biological ClocksCLOCK ProteinsCircadian RhythmCircadian ClocksPeriod Circadian ProteinsARNTL Transcription FactorsSuprachiasmatic NucleusCryptochromesPhotoperiodFlavoproteinsCavesLightCircadian Rhythm Signaling Peptides and ProteinsDarknessMelatoninNuclear ProteinsBasic Helix-Loop-Helix Transcription FactorsGene Expression RegulationTranscription FactorsModels, BiologicalPeriodicityNeurospora crassaDrosophila ProteinsTrans-ActivatorsCell Cycle ProteinsRNA, MessengerTime FactorsNuclear Receptor Subfamily 1, Group D, Member 1AgingFeedback, PhysiologicalChronobiology DisordersPhotoreceptor Cells, InvertebrateE-Box ElementsMolecular Sequence Data