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Spectral transformations in purple membranes of halobacterium halobium effect of the transition 560 570 and blue light on photochemical processes


, : Spectral transformations in purple membranes of halobacterium halobium effect of the transition 560 570 and blue light on photochemical processes. Biofizika 23(6): 1019-1023

Effect of reversible photodependent spectral transition 560 .tautm. 570 of the basic absorption band in purple membranes (PM) in water on the accumulation of short-living forms 412 and 650 of bacteriorhodopsin (BR) photochemical cycle was studied. Photochemical transformations in BR proceed as a minimum by 2 independent cycles, whose initial spectral forms were represented by BR with retinene in the form 13 cis and BR with retinene in the form of trans. In the course of the transition 560 .tautm. 570 a long-living spectral form 370-410-430 sensitive to the blue light is formed. This and literature data suggested a new scheme of photochemical processes in PM and connection between some stages of these processes and ejection and absorption of PM proton was proposed.

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