The activity of mammalian polynucleotide ligase on x-irradiated DNAs.

Abstract

Selected samples of heterogeneous DNA from calf thymus with similar number-average molecular weight, Mn, and a low incidence of single-strand breaks were exposed in aqueous solutions to a mild X-ray dose of 1500 rads. The irradiation produced on the average about 0.2 bihelical and 2.2 monohelical scissions per DNA molecule of 1708 000 Mn. The percent… (More)

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