Abstract
The spectroscopic characteristics and pathways of energy transfer in the C-phycocyanin monomer (alphabeta) and trimer (alphabeta)3 isolated from cyanobacterium Westiellopsis prolifica have been investigated by absorption, excitation, fluorescence, fluorescence excitation polarization and fluorescence polarization spectra and the deconvolution of those spectra. The phenomenon of an energy-back-transfer within a C-phycocyanin trimer has been found, and a tentative model of the bidirectional energy transfer is proposed by us, which describes well our experimental results.
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