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QUALITATIVE STUDIES OF THE LOW TEMPERATURE PHOTOCHEMISTRY OF RHODOPSIN AND RELATED PIGMENTS
Author(s) -
WADDELL WALTER H.,
LECOMTE JULIETTE,
WEST JOHN L.,
YOUNES USAMA E.
Publication year - 1984
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.1751-1097.1984.tb03430.x
Subject(s) - rhodopsin , pigment , photochemistry , chemistry , absorption (acoustics) , irradiation , absorption spectroscopy , absorption band , retinal , materials science , optics , organic chemistry , biochemistry , physics , nuclear physics , composite material
— Rhodopsin, the isomeric pigments formed from 9‐ cis ‐ and 9, 13‐ dicis ‐retinal, and the synthetic pigments formed from 9‐ cis ‐ and 11‐ cis ‐14‐methylretinal were irradiated with 490 nm light at ‐196C. Absorption spectral changes indicate that a distinguishable bathorhodopsin type intermediate may be formed for each pigment. The bathorhodopsin intermediates of the 9‐ cis pigments have band maxima hypsochromically shifted by4–5 nm compared to their corresponding rhodopsins. The bathorhodopsin type intermediate formed upon irradiation of 9, 13‐ dicis ‐rhodopsin has an absorption that maximizes 6 nm shorter than that of rhodopsin. Band maxima of the bathorhodopsin intermediates of the 14‐methylrhodopsins are bathochromatically shifted ca. 8 nm compared to their corresponding rhodopsins.