Figure 3

Melanocyte functions on UV exposure: [a] i-ii: Catecholamines: Catecholoxidase, pigment transfer, dopamine, and noradrenalin: increase with increasing dose of UV and sequentially on exposure to 120 s UV [b] i-ii: Indoleamines : UV dose response: Serotonin positivity increases with the dose of UV and sequentially to a 120 s pulse of UV to a peak at 3 h returning to control levels after 6 h. Melatonin decreases with increasing exposures of UV to13% after 120 s UV at 3 h followed by a rise to 85%, at 6 h incubation. [c]: Hormone expression: The melanocyte expresses ACTH: 80%, HGH: 85% and PRL: 93% 3 h after exposure to 120 s UV [d] Diagram depicting light sensitive enzymes NAT/HIOMT inhibited by light and catecholoxidase activated by light.