Arylalkylamine N-AcetyltransferaseCircadian RhythmPineal GlandMelatoninArylamine N-AcetyltransferaseAcetylserotonin O-MethyltransferaseTryptaminesSleep Disorders, Circadian RhythmSuprachiasmatic NucleusPeriod Circadian ProteinsCircadian Rhythm Signaling Peptides and ProteinsCLOCK ProteinsBiological ClocksCircadian ClocksPhotoperiodARNTL Transcription FactorsRetinaChronobiology DisordersSheepActivity CyclesJet Lag SyndromeLightDarknessCryptochromesMolecular Sequence Data