2001
DOI: 10.1021/bi001499c
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Alkaline Denaturation of the Light-Harvesting Complex II from the Purple Bacterium Ectothiorhodospira Sp.:  Kinetic Evidence of the Existence of the 780 nm Upper Exciton Component of the B850 Bacteriochlorophylls

Abstract: The light-harvesting complex II of the purple bacteria has two strong near-infrared electronic absorption bands around 800 (B800) and 850 (B850) nm, arising from the Q y transitions of the bacteriochlorophyll a. In the present work, high concentrations of NaOH were used to study the destabilization of the complex of the Ectothiorhodospira sp. The majority of the bacteriochlorophylls were monomerized within 90 min of treatment. However, the kinetic patterns of the two near-infrared bands were remarkably differe… Show more

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“…200 nm, as compared to the corresponding in vitro spectrum. 7 The photo-absorption processes and the energy transfer reactions in purple bacteria have been the subject of many experimental [6][7][8][9][10][11][12][13] and theoretical or computational [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30] studies. A comprehensive review article with the title Photophysics of photosynthesis.…”
Section: Introductionmentioning
confidence: 99%
“…200 nm, as compared to the corresponding in vitro spectrum. 7 The photo-absorption processes and the energy transfer reactions in purple bacteria have been the subject of many experimental [6][7][8][9][10][11][12][13] and theoretical or computational [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30] studies. A comprehensive review article with the title Photophysics of photosynthesis.…”
Section: Introductionmentioning
confidence: 99%