Abstract

Polarized pump–probe spectroscopy was performed with 1.5–2-psec resolution on the bacteriochlorophyll a protein antenna complex from the green sulfur bacterium Prosthecochloris aestuarii and on native and enriched photosystem I particles from spinach. The resulting photobleaching profiles reflect the details of singlet electronic-excitation transport in these photosynthetic antennas, in which the pigments are complexed by proteins into clusters of five or more chromophores.

© 1990 Optical Society of America

Energy transfer in photosynthetic light-harvesting antennas

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