COMPUTER-SIMULATION ON KINETICS OF PRIMARY PROCESS IN PHOTOSYNTHESIS OF ALGAE .4. EXCITATION-ENERGY TRANSFER IN PHYCOBILISOMES FROM BLUE-GREEN-ALGAE

A more exact model of phycobilisomes has been designed with the rods c omposed of the hexamer disks and an abstract allophycocyanin (APC) cor e. Based on this model, the excitation energy transfer was simulated u sing the computer simulation technique. The simulation shows that the excitation energy is transferred from the outlayer disk to the core in a partly reversible way in phycobilisomes, and that the transfer rate from the last disk to the core is less than those between disks. The energy transfer between the two trimers in a hexamer is dominantly thr ough the alpha(84)-chromophores (m), while that between the disks is t hrough the beta(84)-chromophores (f) that are also responsible for the transfer of energy into the core.