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. Author manuscript; available in PMC: 2022 Jul 1.
Published in final edited form as: J Photochem Photobiol B. 2021 May 12;220:112212. doi: 10.1016/j.jphotobiol.2021.112212

Figure 5. Mechanism of red light mediated exocytosis leading to vasodilation.

Figure 5.

Red light (670 nm) triggers endosome formation and subsequent exocytosis. The light also induces NO release from cytosolic RSNO. Protein RSNO and NO accumulate in vesicles which exit the endothelium and elicit dilation of smooth muscle cells.