ESR STUDIES OF RADIATION PROTECTION MECHAUISMS BY BASIC AMINO ACIDS

Li Xuepeng; Lin Nianyun; Tu Tiecheng; Xie Jidong

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ESR STUDIES OF RADIATION PROTECTION MECHAUISMS BY BASIC AMINO ACIDS

更新时间：2023-04-23

- ESR STUDIES OF RADIATION PROTECTION MECHAUISMS BY BASIC AMINO ACIDS
- Journal of Radiation Research and Radiation Processing Vol. 2, Issue 2, Pages: 17-22(1984)
- 作者机构：
  
  1.中国科学院上海原子核研究所
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Li Xuepeng, Lin Nianyun, Tu Tiecheng, et al. ESR STUDIES OF RADIATION PROTECTION MECHAUISMS BY BASIC AMINO ACIDS. [J]. Journal of Radiation Research and Radiation Processing 2(2):17-22(1984)
DOI：

Li Xuepeng, Lin Nianyun, Tu Tiecheng, et al. ESR STUDIES OF RADIATION PROTECTION MECHAUISMS BY BASIC AMINO ACIDS. [J]. Journal of Radiation Research and Radiation Processing 2(2):17-22(1984) DOI：

摘要

本文研究了组氨酸和精氨酸对胸腺嘧啶的辐射保护机理。用ESR方法和分子轨道计算确证其辐射保护是由于电子清除和从胸腺嘧啶阴离子向碱性氨基酸的转移。碱性氨基酸的亲电子性能随质子化程度而异，在pH=7的条件下，组氨酸对胸腺嘧啶的辐射保护机理可能是电子转移与氢原子转移的协同过程。

Abstract

In this paper the mechanisms of radiation protection exerted by histidine and arginine on thymine were studied. By means of ESR and molecular orbital calculations the radiation protection mechanism via electron transfer from thymine anion to the basic amino acids has heen confirmed. The electrophilic property of the amino acids varies with thier degree of protonation. Under PH7 condition, the mechanism of radiation protection by histidine on thymine may be a coordinated process of electron and hydrogen transfer.

关键词

碱性氨基酸电荷转移保护氢原子转移电子自旋共振胸腺嘧啶组氨酸精氨酸

Keywords

Basic amino acidCharge transfer protectionHydrogen transferESRThymineHistidineArginine

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