The polarization model in bacterial photosynthesis.
The widely accepted model of reaction center /RC/ functioning is proved to come into contradiction with some recent data. In particular, it cannot explain why only a minor part of electronic excitations (approximately 10%) escapes from excited RC special pairs back to antenna BChls. Therefore we believe that the model must be substantially modernized. In 1981 we developed a new model/1,2/. We suggested a femtosecond state to precede primary e-transfer reaction due to reorientation of water molecule dipole in the electric field of excited RC dimer. This mechanism is responsible for energy trapping before the primary e-transport occurs. During last years his mechanism got support from various experimental works. Now this polarization model claims to fit all reliable experimental data at least in bacterial photosynthesis.
Borisov AYu
A. N. Belozersky Institute of Physico-Chemical Biology, Moscow State University.
Fok
M V
MV
D001419:Bacteria / Q000737:chemistry*; D005454:Fluorescence Polarization; D007700:Kinetics; D008956:Models, Chemical; D010788:Photosynthesis; D013997:Time Factors; D014867:Water / Q000737:chemistry
D014867:Water