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Keywords:

  • cysteine;
  • electron transfer;
  • peptides;
  • proton transfer;
  • relay amino acids

Abstract

Thumbnail image of graphical abstract

Caught on the hop: In multistep electron transfer (ET) reactions through peptides, aliphatic amino acids can also act as relay stations. With cysteine, the reaction occurs as a proton-coupled electron transfer (PCET) with water used as a mediator for the proton transfer (see picture).