Acta Phys. -Chim. Sin. ›› 1996, Vol. 12 ›› Issue (12): 1114-1118.doi: 10.3866/PKU.WHXB19961214

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Pulse Radiolysis of Phosphoryl and Non-phosphoryl Methionine in Aqueous Solution

Chu Gao-Sheng,Zhang Zhi-Cheng,Zhang Man-Wei,Yao Si-De,Wang Wen-Feng,Lin Nian-Yun   

  1. Department of Applied Chemistry,University of Science and Technology of China,Hefei 230026|Laboratory of Radiation Chemistry,Shanghai Institute of Nuclear Research,Academia Sinica,Shanghai 201800
  • Received:1996-04-29 Revised:1996-09-04 Published:1996-12-15
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Abstract:

•OH radical induced oxidation of methionine and N-phosphoryl methionine in aqueous solutions has been investigated using optical pulse radiolytical technique, the influence of N-phosphoryl group on the radiolytical processes of methionine has been explained by molecular structure and the rate constants of oxidation of N-phosphoryl methionine (NDM) by the •OH radicals at different pH values have been determined. This research result suggests that the phosphonate ester has a coordinating effect on the radioprotection of methionine to the biological systems.

Key words: Pulse radiolysis, Methionine, N-phosphoryl methionine, α-amino radical