Evidence for the Formation of Ozone (or Ozone-Like Oxidants) by the Reaction of Singlet Oxygen with Amino Acids

Scheme 1

Previously proposed pathway for methionine-catalysed ozone formation via methionine oxidation products such as methionine persulfoxide 2, methionine sulfoxide 3, and a trioxyanionic derivative 4 [17] and suggested possibility of ozone and methionine sulfoxide formation from persulfoxide 2 via tetroxide anion 5.