Photosynthesis: Photons to Protons
Most of the chlorophyll or bacteriochlorophyll molecules in the photosynthetic organelle serve as an antenna for light gathering. Approximately one chlorophyll molecule out of 500, and one bacteriochlorophyll molecule out of 50–100, is connected to the electron transport chain through special reaction center (bacterio)chlorophylls that trap excitation energy because they can transfer electrons with high efficiency on a picosecond time scale from the excited state to an acceptor. The theory of light energy transfer is central to photosynthesis, and also important for topographical studies of distance mapping between sites in macromolecules labelled with fluorescent probes.
KeywordsTyrosine Manganese Tryptophan NADH Histidine
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