THE PHOTOCHROMIC PROPERTIES OF 4-KETO BACTERIORHODOPSIN

Citation
T. Jaaskelainen et al., THE PHOTOCHROMIC PROPERTIES OF 4-KETO BACTERIORHODOPSIN, Optical materials, 6(4), 1996, pp. 339-345
Citations number
19
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Material Science",Optics
Journal title
ISSN journal
0925-3467
Volume
6
Issue
4
Year of publication
1996
Pages
339 - 345
Database
ISI
SICI code
0925-3467(1996)6:4<339:TPPO4B>2.0.ZU;2-O
Abstract
The all-trans-retinal of the native chromoprotein of bacteriorhodopsin (BR) purple membrane was replaced with the synthetic 4-keto retinal. Gelatin films were made from the reconstituted BR and the intensity-de pendent basic optical properties were investigated. It is shown that a t room temperature the M-state is composed of two different absorption bands (maximum at 413 nm and 435 nm) with different relaxation times. Unexpected low-intensity transmission properties which cannot be expl ained by the two-level model are reported. The M-state of the 4-keto B R is shown to be about 100 times slower than the M-state of the simila r wild type BR-film.