In addition to allowing us to see, the mammalian eye also detects light for a number of "nonvisual" phenomena. A prime example of this is the timing of the sleep/wake cycle, which is synchronized by ...
The visual phototransduction cascade begins with a cis–trans photoisomerization of a retinylidene chromophore associated with the visual pigments of rod and cone photoreceptors. Visual opsins release ...
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