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A theory of excitation energy transfer within the chlorosomal antennae of green bacteria has been developed for an exciton model of aggregation of bacteriochlorophyll (BChl) c (d or e). This model of six exciton-coupled BChl chains with low packing density, approximating that in vivo, and interchain distances of approximately 2 nm was generated to yield the(More)
Spectral hole burning has been used to prove experimentally the existence in natural antenna of one of the predicted structural optimizing factors--antenna pigment oligomerization [J. Theor. Biol. 140 (1989) 167]--ensuring high efficiency of excitation energy transfer from antenna to reaction center. This point has been examined for the chlorosomal antenna(More)
Independent experimental and theoretical evaluation was performed for the adequacy of our previously proposed general molecular model of the structural organization of light-harvesting pigments in chlorosomal bacteriochlorophyll (BChl) с/d/e-containing superantennae of different green bacteria. Measurement of the temperature dependence of steady-state(More)
Independent experimental and theoretical evaluation was performed for the adequacy of our previously proposed general molecular model of structural organization of light-harvesting pigments in chlorosomal bacteriochlorophyll (BChl) c/d/e-containing superantenna of different green bacteria. Simultaneous measurement of hole burning in the optical spectra of(More)
We have demonstrated temperature-dependence of the steady-state fluorescence lineshape of the bacteriochlorophyll (BChl) c band measured for intact cells of the green bacterium Chloroflexus aurantiacus over the 1.8-293 K range. The measured temperature-dependence has been shown to be in good agreement with the theoretical one, calculated for our original(More)
Spectral hole burning studies of intact cells of the green bacterium, Chlorobium limicola, have proven that the Qy-absorption system of antenna bacteriochlorophyll c (BChl c) should be interpreted in terms of the delocalized exciton level structure of an oligomer. For the first time the 0-0 band of the lowest exciton state of BChl c oligomers has been(More)
The Qx-Qy splitting observed in the fluorescence excitation spectra of Mg-mesoporphyrin-IX substituted horseradish peroxidase (MgMP-HRP) and of its complex with naphthohydroxamic acid (NHA) was studied by spectral hole burning techniques. The width of a hole directly burnt in the Qy band and that of a satellite hole indirectly produced in Qy as a result of(More)
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