Determination of the g tensor of the primary donor cation radical in single crystals of Rhodobacter sphaeroides R-26 reaction centers by 3-mm high-field EPR

摘要: Three millimeter (W band, 95 GHz) EPR meassurements were performed on single crystals of Rb. sphaeroides R-26 reaction centers at room temperature to determine the g tensor primary donor cation radical P 865 .+ . Due applied high magnetic field (3.4 T), magnetically inequivalent sites in unit cell could be resolved. Some results are corroborated by additional measurements perdeuterated from fb. wild type 2.4. 1, which crystallized for first time