Excitation energy-transfer processes between two trimers in C-phycocyanin hexamer from the cyanobacterium: Biology, 53
Journal
Journal of Photochemistry and Photobiology B
Journal Issue
1-3
Date Issued
1999
Author(s)
Abstract
We have employed group theory and picosecond time-resolved fluorescence isotropy and anisotropy spectroscopy methods to explore the excitation transfers within an isolated C-phycocyanin (C-PC) hexamer (αβ)6(PC)L27(RC) situated at the end of the rod proximal to the core of the pycobilisome (PBS) in the cyanobacterium Anabaena variabilis. The group-theory results imply that excitation energy transfer between two trimers occurs between the lowest exciton level of each trimer. The excitation energy-transfer process might occur at a rate of 10-20 ps, and it may be described by an exciton hopping-like Forster transfer mechanism. Dynamic components of 45-50 ps are assigned to the excitation transfer from β155-PCB chromophores to the exciton states of dimers, which consist of two neighbouring monomers of the same trimer in an isolated C-PC hexamer.
SDGs
Type
journal article