| has gloss | eng: The Fenna-Matthews-Olson (FMO) complex is a water soluble complex and was the first pigment-protein complex (PPC) that has been structure analyzed by x-ray spectroscopy [Fenna & Matthews, 1975]. It appears in green sulfur bacteria and mediates the excitation energy transfer from the light-harvesting chlorosomes to the membrane embedded bacterial reaction center (bRC). The structure of the FMO complex is trimeric (C3-symmetry) and each of the three monomers contains seven bacteriochlorophyll a (BChl a) molecules, which are bound to the protein scaffold via ligation of their central magnesium atom either to amino acids of the protein (mostly histidine) or water-bridged oxygen atoms (only one BChl a of each monomer). Since the structure of the FMO complex is available, one can try to calculate structure based optical spectra in comparism with experimental optical spectra [Vulto et al. |
