title: The cycle of photochromic reactions of a bacteriorhodopsin analog with 4-keto-retinal.
abstract: Photochemical reactions in a bacteriorhodopsin analog with 4-keto-retinal (4-keto-BR) were studied by using low-temperature and pulsed laser absorption spectroscopy. A photocycle of the photochemical reactions of 4-keto-BR is proposed, which, unlike the photocycle of native BR, includes several spectrally and kinetically distinguishable M-type and O-type intermediates.
mesh_terms: D001436:Bacteriorhodopsins / Q000031:analogs & derivatives* / Q000737:chemistry / Q000528:radiation effects; D007700:Kinetics; D007834:Lasers; D010777:Photochemistry; D013053:Spectrophotometry; D013696:Temperature
chemical_list: C096990:4-ketobacteriorhodopsin; D001436:Bacteriorhodopsins