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. 2019 Jul 19;20(14):3533. doi: 10.3390/ijms20143533

Figure 2.

Figure 2

Melatonin synthesis by pinealocytes. The activation of the suprachiasmatic nuclei (SCN) in light conditions inhibits the periventricular nucleus (PVN) and melatonin production. In the absence of light, the PVN is activated and triggers melatonin production through its projections. The dotted line represents the retrocontrol pathway.