Abstract
Numerous autotrophic organisms alter the composition and function of their photosynthetic apparatus under external stress conditions. This is also the case of the cyanobacterial response to iron deprivation that includes (besides other changes) the synthesis of a new, iron-stress induced chlorophyll binding protein. The aim of this contribution is the spectroscopic characterization of such complex designated CP 34* and isolated from the iron-stressed cells of the thermophilic cyanobacterium Synechococcus elongatus. The study is focused on the ultrafast primary photosynthetic processes assessed by means of low temperature and hole-burning spectroscopy. These techniques allowed us to obtain the exciton relaxation times in the complex and to determine the strength of pigment-protein interaction. Also the site distribution function acquired from the burned holes depth is shown.
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