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- W2045891752 abstract "The developmental regulation of the mammalian DNA-repair enzyme uracil DNA glycosylase was examined in the rat at specific intervals ranging from -4 days before to 106 days after birth. Enzyme activity was quantitated by in vitro biochemical assay. In the adult animal, as measured in crude cell extracts, three organs (liver, kidney and spleen) had significant levels of activity. In contrast, three organs (brain, heart and lung) had low activity. Partial purification of this enzyme identified one major species of molecular weight 32,700 Da, demonstrating the quantitation of the nuclear glycosylase. During development, with the exception of the liver, the specific activity of the glycosylase paralleled the regulation of DNA synthesis. In these organs the highest levels of the glycosylase and the rate of DNA replication were observed around the time of birth. In the liver, DNA replication was similarly regulated. However, glycosylase activity was minimal at early stages of life. Instead, maximal levels were observed at 14-21 days after birth. At that time DNA replication was severely reduced. These results demonstrate that individual organs express this DNA-repair enzyme in a distinct and specific pattern during development. Accordingly, the regulation of the uracil DNA glycosylase during development may provide a model system to examine the differential regulation of DNA-repair genes." @default.
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- W2045891752 date "1993-01-01" @default.
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- W2045891752 title "Developmental regulation of the base excision repair enzyme uracil DNA glycosylase in the rat" @default.
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- W2045891752 doi "https://doi.org/10.1016/0921-8777(93)90064-n" @default.
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