Abstract
The gamma-radiolysis of methionine in 10-3M aqueous solution was studied. From the yield vs. dose plots, the following values were obtained: G(-Methionine)=3.0, G(Methionire sulfoxide)=0.30, G(α-Aminobutyric acid)=0.46, G(3-Methylthio propylamine)=0.59, G(Methional)=0.08, G(Carboxylic acid)=0.24, G(Mercaptan+Disulfide)=0.61, G(Ammonia) =1.48, and G(Carbon dioxide)=1.45. From these results, it was concluded that major reaction was deamination and decarboxylation by _??_OH radical attack.
Addition of methanol as the second solute at concentration above 4×10-3M could not lower G(Methionine sulfoxide), suggesting the reaction of methionine with secondary radical produced from methanol.
Existence of similar reaction was suggested in the radiolysis of methionine in aqueous pork extract.
