title: Nuclear coupling of 33S and the nature of free radicals in irradiated crystals of cysteine hydrochloride and N-acetyl methionine.
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.
mesh_terms: D003545:Cysteine; D005609:Free Radicals; D008715:Methionine / Q000031:analogs & derivatives* / Q000528:radiation effects; D008956:Models, Chemical; D011830:Radiation Effects; D014965:X-Rays
chemical_list: D005609:Free Radicals; D008715:Methionine; D003545:Cysteine