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. Author manuscript; available in PMC: 2012 Oct 17.
Published in final edited form as: Eur J Neurosci. 2004 Feb;19(4):898–906. doi: 10.1111/j.0953-816x.2004.03117.x

Figure 1.

Figure 1

Circadian patterns of bioluminescence recorded from olfactory bulb explants taken from rats carrying a Period1-luciferase (Per1-luc) transgene. a, Daily oscillations of Per1 gene activity were present in the OB by E19. b–c, The average period and amplitude of rhythmic OB cultures did not depend upon developmental age. d, From E19 to P7, the Per1-luc expression in the OB peaked progressively later until it reached its mature phase around one week postnatal. Phase is given in Zeitgeber Time where ZT0 is dawn in the animal colony (7:00 a.m.) and ZT12 is dusk (7:00 p.m.). The time of lights on and off are shown on the right as white and black bars. Error bars show S.E.M.