Nuclear coupling of 33S and the nature of free radicals in irradiated crystals of cysteine hydrochloride and N-acetyl methionine

Proc Natl Acad Sci U S A. 1975 Sep;72(9):3486-90. doi: 10.1073/pnas.72.9.3486.

Abstract

The 33S hyperfine structure has been observed in the electron spin resonance of irradiated crystals of cysteine-HCl-H2O and of N-acetyl DL-methionine. An analysis of the results shows that in both substances the free radicals that are stable at room temperature are disulfide radicals, RCH2SS. A possible mechanism for formation of these radicals is proposed.

Publication types

  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Cysteine*
  • Free Radicals
  • Methionine / analogs & derivatives*
  • Methionine / radiation effects
  • Models, Chemical
  • Radiation Effects
  • X-Rays

Substances

  • Free Radicals
  • Methionine
  • Cysteine