Descxyribonncleic acid from protein was irradiated with 1- to 2-Mev electrons and changes in the physicochemical properties were measured. The changes were essentially the same in dry samples and those containing 25% water. The principal effect of radiation was a decrease in viscosity. Changes were interpreted as the result of the production of branched molecules by the simultaneous formation of cross links and main-chain scissors. Possible reaction mechanisms involved are discussed. (C.H.)
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Lett et al. (1961) studied this question.
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