Abstract

Phycobilisomes (PBS) big antenna complexes occuring in cyanobacteria and red algae are extremely efficient transducers of excitation energy (Glazer, 1984). It was suggested previously (Mimuro et al., 1988–1989) that are at least two independent pathways of excitation energy transfer from phycoerythrin to final excitation acceptorallophycocyanin. It is possible that the chromophores taking part in various chains of energy transfer are differently oriented in respect to the PBS structure. Therefore we undertake the investigation of oriented PBS using polarized light spectroscopy.

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