Photochemical Primary Process of Octopus Rhodopsin
A visual pigment rhodopsin is a chromoprotein with an 11-cis retinal. Rhodopsin is photodecomposed to an all-trans retinal and an apoprotein opsin. The primary event is the photoisomerization of retinal from 11-cis to all-trans conformation  followed by sequential thermal reactions . Intermediates have been found by low-temperature spectroscopy except the first intermediate [3,4] primerhodopsin (Batho  or photorhodopsin ), which has a bathorhodopsin-like red-shifted absorption spectrum. There are three intermediates, bathorhodopsin, hypsorhodopsin, and primerhodopsin, in the picosecond region. The sequence among them at physiological temperature has not yet been established.
KeywordsAbsorption Cross Section Bovine Rhodopsin Difference Absorption Spectrum Lower Excited Singlet State Lauryl Ester
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