Prevention by Cysteamine of Radical Formation in Bovine Serum Albumin by γ-Rays

Electron Paramagnetic Resonance in Biology

“…The protective effect of cysteamine on bovine serum albumin exposed to -y rays at liquid nitrogen temperature (Fig. 23) (34) seems to indicate that the energy alone is transferred. In this system the SH groups are not reacting in an ordinary chemical manner, i.e.…”

“…It has generally been concluded that the energy of the incident radiation is chemically transferred (involving the making and breaking of bonds) to the S group (34,35).…”

Intermolecular Transfer of Radiation Energy at 77°K: An ESR Study of Irradiated Mixtures of Macromolecules and Oxidized Penicillamine

“…A number of electron spin resonance (ESR) studies (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15) have been carried out to investigate the mechanisms for intermolecular transfer of unpaired spins in irradiated dry mixtures. Molecular mixtures of macromolecules and sulfur compounds have been of particular importance in these studies.…”

Grundlagen und strahlenbiologische Anwendungen der Elektronen-Spin-Resonanz-Meßmethode

“…sind. Alexander und Mitarbeiter[25,26,27] finden, daß die ESR-Spektren von röntgenbestrahlten BSA (Bovin Serum Albumin) nur dann eine Ähnlichkeit mit dem Cysteinspektrum zeigen, wenn bei Bestrahlung und Messung Sauerstoff anwesend war. Außerdem traten Überlagerungen der beiden Spektren-Typen auf.…”