Effects of various mutagens on replicon initiation and chain elongation of DNA replication was studied by pulse-labeling with (³H) - thymidine and sedimentation analysis of DNA. When treated with those mutagens to mammalian cells, each cell line show...
Effects of various mutagens on replicon initiation and chain elongation of DNA replication was studied by pulse-labeling with (³H) - thymidine and sedimentation analysis of DNA. When treated with those mutagens to mammalian cells, each cell line showed the reduced rate of DNA synthesis and the interrupted DNA replication in dose dependent manner. At low doses, the inhibition of replicon initiation was primarily caused and at high fluences the inhibitory effect appeared in chain elongation and termination of DNA replication. Using the method of `Pulse-Chase` we could also observed the postreplication repair, indicating that the nascent DNA growth normally occurred, although still damaged sites remained on parental DNA during DNA replication.