Uracil-DNA glycosylase and apurinic/apyrimidinic (AP) endodeoxyribonuclease have been purified from cultured carrot cells. The two enzymes, separated by affinity chromatography on Sepharose-poly(rU), were found to have properties similar to those of the homologous bacterial and mammalian enzymes. The action of AP endodeoxyribonuclease on (dA)230 . (dT, dU)230 partially depyrimidinated by uracil-DNA glycosylase suggests that these two enzymes might act successively to initiate the repair of uracil-containing DNA.
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Talpaert-Borlè et al. (1982) studied this question.
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