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Architecture and mechanism of the light-harvesting apparatus of purple bacteria

By Xiche Hu, Ana Damjanović, Thorsten Ritz and Klaus Schulten

Abstract

Photosynthetic organisms fuel their metabolism with light energy and have developed for this purpose an efficient apparatus for harvesting sunlight. The atomic structure of the apparatus, as it evolved in purple bacteria, has been constructed through a combination of x-ray crystallography, electron microscopy, and modeling. The detailed structure and overall architecture reveals a hierarchical aggregate of pigments that utilizes, as shown through femtosecond spectroscopy and quantum physics, elegant and efficient mechanisms for primary light absorption and transfer of electronic excitation toward the photosynthetic reaction center

Topics: Colloquium Paper
Publisher: The National Academy of Sciences
Year: 1998
OAI identifier: oai:pubmedcentral.nih.gov:34498
Provided by: PubMed Central
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