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. Author manuscript; available in PMC: 2013 Feb 5.
Published in final edited form as: Mol Cell Endocrinol. 2011 Jul 18;349(1):13–19. doi: 10.1016/j.mce.2011.07.009

Figure 2. Time lag between serotonin and melatonin secretion in rodents.

Figure 2

Serotonin release precedes melatonin release by about 1 hr in rat and 4 hrs in hamsters. In rats, the time lag is constant, regardless the strain and individual differences in timing of melatonin release.