ROSEOFLAVIN AS A BLUE LIGHT RECEPTOR ANALOG: SPECTROSCOPIC CHARACTERIZATION |
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| Authors: | Pill-Soon Song Edward B Walker Richard D Vierstra Kenneth L Poff |
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| Institution: | *Department of Chemistry, Texas Tech University, Lubbock, TX 79409, U.S.A.;?MSU/DOE Plant Research Laboratory, Michigan State University, East Lansing, MI 48824, U.S.A. |
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| Abstract: | Abstract— The blue light absorption band of roseoflavin is polarized along the axis roughly connecting N3-C8 positions. A weak, second π→π* transition with a polarization angle of ca. 25° is hidden under the short wavelength side of the blue absorption band. The excited state of roseoflavin is somewhat more basic than the ground state, by a 1.5 p K a unit. The fluorescence quantum yield and lifetime of roseoflavin are substantially lower than those of other flavins, thus making it kinetically less efficient as a blue light photoreceptor. |
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