Such patterns are consistent with the elimination of cell cycle checkpoints and suggest that an event subsequent to division was responsible for the definitive failure of atm to recover from the IR in primary and secondary roots.
These data support the idea that elimination of this fidelity checkpoint, by deletion of loop 1, lowers the energy barrier for establishing active site geometry consistent with catalysis.
For initial establishment of the G2/M checkpoint, elimination of the Cdc25C protein phosphatase activity appears to be a critical step (Peng et al, 1997; Sanchez et al, 1997; Zeng and Piwnica-Worms, 1999; Graves et al, 2001; Zhao and Piwnica-Worms, 2001).
However, consistent with the elimination of one or more kinetic checkpoints that prevent misincorporation, the base substitution error rate of the loop deletion mutant increases for all 12 mispairs and its sugar selectivity decreases.
This phenomenon often referred as the poorly defined term "mitotic catastrophe", implies the abrogation of checkpoints and was proposed to represent an alternative mode of elimination of damaged cells (Castedo et al., 2004; Vakifahmetoglu et al., 2008).
Shorter checkpoint intervals cause frequent checkpointing, large number of checkpoints thus resulting in much time spent in checkpoint activity, higher disk space required to store checkpoint images.
Constraint C5 specifies the range on the number of checkpoints.
After running the AMPL/CPLEX optimizer with these constraints for maximizing the placement of checkpoints, we get the total number of checkpoints equal to 40 such that the execution time for a checkpoint is 1 time unit.
With lots of checkpoints.
I wrote about DUI Checkpoints as Memorial Day Weekend approached and cautioned my readers about the additional presence of checkpoints.
