Skip to main content
. 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 1. Pineal gland rhythms.

Figure 1

Dietary tryptophan is sequentially converted to 5-hydroxytryptophan (5-HTP, light blue), 5-hydroxytryptamine (5-HT, pink), N-acetylserotonin (NAS, dark blue), and melatonin (yellow). Dark shaded areas represent dark period. Pineal rhythms over 3 consecutive days in one rat were monitored by pineal microdialysis.