Vision
Vision begins with the photoisomerization of retinal. When the 11-cis-retinal chromophore absorbs a photon it isomerizes from the 11-cis state to the all-trans state. The absorbance spectrum of the chromophore depends on its interactions with the opsin protein to which it is bound; different opsins produce different absorbance spectra.
Read more about this topic: Retinal
Famous quotes containing the word vision:
“I wish I could take back some of the things I said and some of the things I did. But in the bigger picture, I don’t feel that it was violent and terrible. I feel like it was primarily—obviously not completely—moral, based on a vision that the government should be better, and that people could be better, and that democracy should be real.”
—Bernardine Dohrn (b. 1942)
“Redeem
The time. Redeem.
The unread vision in the higher dream
While jewelled unicorns draw by the gilded hearse.”
—T.S. (Thomas Stearns)
“In the works of man, everything is as poor as its author; vision is confined, means are limited, scope is restricted, movements are labored, and results are humdrum.”
—Joseph De Maistre (1753–1821)