The Influence of Symmetry on the Electronic Structure of the Photosynthetic Pigment-Protein Complexes from Purple Bacteria

摘要: The primary reactions of purple bacterial photosynthesis take place in two pigment-protein complexes, the peripheral LH2 complex and core RC-LH1 complex. In order to understand any type excitation-energy transfer LH system detailed knowledge about correlation between geometrical structure nature electronically excited states is crucial. interplay arrangement pigments transition probabilities various exciton leads key spectral features, such as narrow lines, that are clearly visible with single-molecule spectroscopy but averaged out conventional ensemble experiments. Combining low-temperature numerical simulations has allowed us achieve a refined structural model for bacteriochlorophyll (BChl a) pigment complexes Rps. palustris. experimental data consistent an equidistant 15 BChl dimers on ellipse, where each dimer been taken homologeous those from B850 pool acidophila.