The phycobilisome terminal emitter transfers its energy with a rate of (20 ps)–1 to photosystem II
Ultrafast time resolved emission spectra were measured in whole cells of a PSI-deficient mutant of Synechocystis sp. PCC 6803 at room temperature and at 77K to study excitation energy transfer and trapping. By means of a target analysis it was estimated that the terminal emitter of the phycobilisome, termed allophycocyanin 680, transfers its energy with a rate of (20 ps)–1 to PSII. This is faster than the intraphycobilisome energy transfer rates between a rod and a core cylinder, or between the core cylinders.
Additional key wordsexcitation energy transfer global analysis light harvesting target analysis
PSI-deficient mutant of Synechocystis sp. PCC 6803
excitation energy transfer
full width at half maximum
instrument response function
root mean square
signal to noise ratio
singular value decomposition
time resolved emission spectrum
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