title: A melatonin rhythm persists in rat pineals in darkness.
mesh_terms: D000818:Animals; D001766:Blindness; D002940:Circadian Rhythm; D003624:Darkness; D008124:Locomotion; D008297:Male; D008550:Melatonin / Q000032:analysis* / Q000096:biosynthesis; D010870:Pineal Gland / Q000032:analysis* / Q000378:metabolism; D051381:Rats
chemical_list: D008550:Melatonin