1.13.11.54 oxidation ARD (Fe), converts the substrate to formate and a keto-acid precursor of methionine that is then converted to methionine (on-pathway) -, 673849 1.13.11.54 oxidation if Fe+2 is bound in the active site, the substrate acireductone reacts with O2 to yield formate and 3-(methylthio)propanoate 675408