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Six chromatographically distinct forms of endonuclease active on apurinic and apyrimidinic sites in DNA have been purified away from DNA phosphatases, DNA N-glycosidases, and other DNases of human placenta. The forms seem to be monomeric proteins of 27,000 to 31,000 daltons, and although catalytically similar, they can be distinguished from one another on(More)
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