title: Circannual clocks: annual timers unraveled in sheep.
abstract: A recent study has revealed new insight into how the annual clock may drive seasonal hormone rhythms in mammals; the data suggest that melatonin-receptor-containing cells in the pituitary gland may operate as key calendar cells, transmitting seasonal temporal information to the endocrine system.
authors: Faculty of Life Sciences, University of Manchester, 3.614 Stopford Building, Oxford Road, Manchester M13 9PT, UK.
authors: Sandrine M
authors: SM
authors: Dupré
authors: Andrew S I
authors: AS
authors: Loudon
mesh_terms: D000818:Animals; D002940:Circadian Rhythm; D008550:Melatonin / Q000502:physiology; D017440:Photoperiod; D044094:Receptors, Melatonin / Q000502:physiology; D012621:Seasons; D012726:Sexual Behavior, Animal; D012756:Sheep / Q000502:physiology*; D015398:Signal Transduction
chemical_list: D044094:Receptors, Melatonin; D008550:Melatonin