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Keywords:

  • charge transfer;
  • chromophores;
  • enzyme catalysis;
  • photoenzymes;
  • transient absorption spectroscopy
Thumbnail image of graphical abstract

Cheap and safe: The catalytic efficiency of a light-dependent photoenzyme (NADPH: protochlorophyllide oxidoreductase) is investigated as a function of the excitation wavelength (see picture). It becomes evident that “red” photons are more efficiently utilized in enzyme catalysis than “blue” photons. This shows an adaptation of the enzyme activity to the natural light conditions.