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Picosecond-resolved fluorescence spectroscopy on FMN bound in flavodoxin from Desulfovibrio vulgaris and Desulfovibrio gigas revealed fluorescence lifetimes of about 30 ps. The lifetime shortening can be explained by charge transfer interaction in the flavin excited state with aromatic amino acid residues. In addition to the short lifetime component, nanosecond lifetimes were also observed in both...
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