Deactivation channels of excited states in green and red fluorescing proteins (GFP, RFP) and mutants as well as flavoproteins have been investigated by steady-state and femtosecond/picosecond time-resolved fluorescence/absorption spectroscopy. Besides fast internal conversion, energy transfer between chromophores in different maturation states in oligomers of DsRed as well as from the antenna molecule to the flavin cofactor in (6-4) photolyase and cryptochrom2 has been established as photophysical primary process. In cryptochrom1, electron transfer from nearby tyrosyl and tryptophane residues to FAD is the initial step in signal transduction, as is intersystem crossing in the LOV2 domain in phototropin.
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Deactivation channels of excited states in green and red fluorescing proteins (GFP, RFP) and mutants as well as flavoproteins have been investigated by steady-state and femtosecond/picosecond time-resolved fluorescence/absorption spectroscopy. Besides fast internal conversion, energy transfer between chromophores in different maturation states in oligomers of DsRed as well as from the antenna molecule to the flavin cofactor in (6-4) photolyase and cryptochrom2 has been established as photophysic...
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