Semi-conservative DNA replication

The Increase in DNA synthesis is not due to stimulatory influences on (semi-conservative) DNA replication but represents DNA repair. This was verified by keeping the cells under conditions that prevent normal (semi-conservative) replication but permit repair ("unscheduled DNA synthesis"). Two major routes are suggested by which NO-Fru-Trp could impart DNA damage and, thus, assume mutagenic properties. 

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