Mutagen-induced changes in cellular deoxycytidine triphosphate and thymidine triphosphate in Chinese hamster ovary cells

作者: C.N. Newman , J.H. Miller

DOI: 10.1016/0006-291X(83)91590-5

关键词: DNA synthesisDNA replicationChinese hamster ovary cellCell killingDeoxycytidine triphosphateThymidine triphosphateBiologyMutagenThymidineMolecular biologyBiochemistry

摘要: Abstract Deoxynucleoside triphosphate concentrations in Chinese hamster ovary cell lines, CHO-K1 and Mut 8–16, were examined following exposure of cells to UV or dimethylsulfate. Marked decreases dCTP observed 2 hr after both mutagens. In contrast, dTTP increased with killing but not Examination DNA synthesis permeabilized the presence excess dNTP substrates suggests that enhances replication while inhibits replication. We therefore ask whether increase ration mutagenized whole either contributes prolongs induced inhibition addition we proposed such an imbalance may also contribute mutations by enhancing probability for base-misincorporation.

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