New concept of energy migration and trapping in purple bacteria. Charge transfer-polaron model.
A new hypothetical concept of the reaction center (RC) and the core BChl antenna is developed which claims to fit all up to date experimental data. In particular, the concept accounts for a number of findings still waiting for an explanation: a) the "red" shifts of the core BChl absorption peaks relative to those in their corresponding core BChls; b) the reason why in purple bacteria the second P2-P800-BPH-Q brunch of RC is inactive c) recent data parallel 1,2 on a small excitation portion which escapes from the excited RC special pair back to antenna BChls; d) why the primary electron donor is not monomer but a pair of parallel B Chls; e) the reason why the fluorescence spectra of the RC special pairs are enormously red-shifted relative to their absorption spectra.
Borisov AYu
A.N. Belozersky Institute of Physico-Chemical Biology, Moscow State University, Russia.
D001429:Bacteriochlorophylls / Q000378:metabolism; D001692:Biological Transport; D004735:Energy Transfer; D045342:Light-Harvesting Protein Complexes; D008954:Models, Biological; D010788:Photosynthesis; D045322:Photosynthetic Reaction Center Complex Proteins / Q000378:metabolism*; D011048:Polarography; D011522:Protons; D012244:Rhodospirillaceae / Q000378:metabolism*; D014867:Water / Q000378:metabolism
D001429:Bacteriochlorophylls; D045342:Light-Harvesting Protein Complexes; D045322:Photosynthetic Reaction Center Complex Proteins; D011522:Protons; D014867:Water