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A study has been made of the γ-ray induced reactions of the peptide derivatives N-acetylglycine and glycylglycine in oxygenated solution. In these systems the OH radical is removed through reaction at the C-H position of the main-chain OH+ RCONHCH₂ R→ RCONH C HR+ H₂ O to yield the corresponding peroxy radical via O₂+ RCONH C HR→ RCONNCH( O₂) R . The subsequent chemistry has been examined in detail. The proposed reaction schemes account for the yields of ammonia, glyoxylic acid, formic acid and hydrogen peroxide observed in both systems.
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Makada et al. (1972) studied this question.
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