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PHOTOREACTIONS OF ISORHODOPSIN AT LOW TEMPERATURES
Author(s) -
PRATT D. C.
Publication year - 1968
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.1968.tb08020.x
Subject(s) - rhodopsin , pigment , photochemistry , chemistry , flash photolysis , retinal , organic chemistry , physics , kinetics , biochemistry , quantum mechanics , reaction rate constant
— The photoreactions of isorhodopsin, a synthetic visual pigment containing 9‐cis retinal, were studied between –45° and –75°C using flash photolysis. Light‐induced absorbancy changes were observed which were indistinguishable from those caused by the photo‐production of prelumirhodopsin from the natural visual pigment rhodopsin. It is concluded that isorhodopsin is converted to prelumirhodopsin although less efficiently than is the natural pigment. Thermally unstable intennediates of bleaching are also converted to pre‐lumirhodop‐sin by light, possibly by way of rhodopsin or isorhodopsin.