Abstract
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 [1] followed by sequential thermal reactions [2]. Intermediates have been found by low-temperature spectroscopy except the first intermediate [3,4] primerhodopsin (Batho [5] or photorhodopsin [6]), 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.
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Ohtani, H., Kobayashi, T., Tsuda, M., Ebrey, T.G. (1987). Photochemical Primary Process of Octopus Rhodopsin. In: Kobayashi, T. (eds) Primary Processes in Photobiology. Springer Proceedings in Physics, vol 20. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-72835-8_10
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DOI: https://doi.org/10.1007/978-3-642-72835-8_10
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