COMPUTER-SIMULATION OF ENERGY MIGRATION IN THE C-PHYCOCYANIN OF THE BLUE-GREEN-ALGAE AGMENELLUM-QUADRUPLICATUM

Two methods for simulation of energy migration in the C-phycocyanin fr agments of PBS were developed. Both methods are based on the statistic al analysis of an excitation behavior in modeling complexes with a lim ited number (up to hundreds) of chromophores using the Monte-Carlo app roach and calculation of migration rates for the system of linear bala nce equations. Energy migration rates were calculated in the case of C -phycocyanin of the blue-green algae Agmenellum quadruplicatum. The ma in channels of energy migration were determined in a monomer, trimer, hexamer, and in the rods consisting of 2-4 hexamers. The influence of the ''screw'' angle between two adjoining trimers of hexamer on the ra tes of energy migration and on its efficiencies in 1-4 hexamers was al so estimated. The analysis was made for the average (random) and real orientation of chromophores in the C-phycocyanin. For both cases the o ptimal angle values were determined and the one for real C-phycocyanin structure was found to be very close (DELTAphi less-than-or-equal-to 5-degrees) to the optimal angle calculated.