抄録
Deoxyribonucleohistone (DNH) from calf-thymus was studied by E. S. R. spectroscopy following gamma-irradiation. Free radicals formed in gamma-irradiated deoxyribonucleohistone were mainly localized in DNA moeity. The G-value for radical production in DNH was 1.6, while the G-values in DNA and histone were 1.1 and 2.1, respectively. Thus the spectrum obtained in deoxyribonucleohistone could be explained as a consequence of an electron transfer from histone to DNA. This observation was also confirmed from E. S. R. spectrum of the reconstituted deoxyribonucleohistone.
