高等学校化学学报 ›› 1983, Vol. 4 ›› Issue (2): 257.

• 研究简报 • 上一篇    下一篇

氮氧自由基的研究(Ⅳ)——氮氧自由基对半胱氨酸的氧化反应

刘有成, 汪秀智, 刘中立   

  1. 兰州大学化学系
  • 收稿日期:1982-02-08 出版日期:1983-04-24 发布日期:1983-04-24

STUDIES ON NITROXIDES (Ⅳ) ——OXIDATION OF CYSTEINE BY 2,2,6,6-TETRAMETHYL-4- HYDROXYPIPERIDINE-1-OXYL

Liu Youcheng, Wang Xiuzhi, Liu Zhongli   

  1. Department of Chemistry, University of Lanzhou, Lanzhou
  • Received:1982-02-08 Online:1983-04-24 Published:1983-04-24

摘要: 氮氧自由基是目前最广泛采用的自旋标记物[1-2]。2,2,6,6-四甲基哌啶氮氧自由基虽然在许多情况下是很稳定的,但是仍然可以发生歧化、单电子氧化还原等反应[3-4]

Abstract: The redox reaction of 2,2,6, 6-tetramethyl-4-hydroxypiperidine-1-oxyl radical with dl-cysteine in buffer solution of different pHhas been studied at room temperature under free of oxygen in the dark.It was found that in acidic buffer the oxidation product of cysteine was cysteic acid, in neutral buffer the product was cystine accompanied by a small amount of cysteic acid, whereas in basic buffer the product was cystine only. The reduction product of the nitroxide was identified as the corresponding hydroxylamine in all these cases.

TrendMD: