Journal of Luminescence 24/25 (1981)815—818 815 North-Holland Publishing Company ENERGY TRANSFER IN PHYCODILIPROTEINS AS STUDIED DY PHDTOCHEMICAL HDLE DURNING

Chlorophyll, the essential part of the photosynthetic reactien cen-ter, absorbs light between 45D and 6D0 nm only weakly and, hence, in rather inefficient in gathering sunlight. To overcome thin drawback, photonynthetic organinmn developped no called nccennory or light harvesting pigmentn. Thene pigmentn gather sunlight efficiently due to their ntrong nhnorption in the regionn of minimum chlorophyll ab— sorption, and transfer the absorbed energy to the chlorophylls of the reaction center. The phycobiliproteins, e.g. phycoerythrin)PE) phycocyanin)PC) and allophycocyanin)APC) are such pigments)1). Fig. 1 shows schematically ~ the seguential energy trans-fer from PE to PC and APC, from where it is eventually PE transferred to the chloro-phylls. Here, we report pho