Day 241 (10q23.1-10q23.32): melanopsin, a blue-light detector


Day 241 has 54 protein-coding genes (browser view) including OPN4 (opsin 4), also known as melanopsin.

Melanopsin was discovered recently, in 1998. Unlike the opsins found in the rod and cone cells of the retina, melanopsin is expressed in ganglion cells of the retina and doesn’t contribute to vision. Instead, it helps set the circadian rhythm.

Click here to see all 8362338 letters of Day 241 with OPN4 underlined.

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