Origin of replication of the Bacillus subtilis chromosome: in vitro approach to the isolation of early replicating segments

Relationship of repair and replicative DNA synthesis to cell cycle in Chinese hamster ovary (CHO-K1) cells

To strengthen the causal association between repair and replicative DNA synthesis, we have simultaneously measured the two types of DNA synthesis in a cell cycle-dependent manner. Synchrony was obtained by counterflow centrifugal elutriation of logarithmic-phase Chinese hamster ovary (CHO) cells kept in suspension cultures. A comparison of cell cycle profiles of ATP-dependent replicative and ATP-independent repair synthesis in permeable cells shows opposite trends. The rates of repair synthesis and replication are inversely correlated.