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University of California, Irvine (UCI) researchers have explored how UV, blue, and red light affect the central brain neurons that allow circadian clock timing to be reset. The researchers found that blue and UV light create a sustained light response that is key to a kind of nonimage-forming vision that averages environmental light levels to determine the time of day and inform internal circadian processes. Red light evokes a less sustained response.
The researchers generated transgenic fruit flies (Drosophila melanogaster) expressing cryptochrome (dCRY), a light-sensitive protein, in the conserved electron transport chain and then measured the flies’ neuronal electrophysiological phototransduction and behavioral responses to…READ MORE