To study whether greater number of cell division is due to higher number of cells entering cell cycle, we used BrdU incorporation assay to assess the number of cells entering the S phase, the restriction point, of cell cycle.
Thus, it is possible that in longer telomeres, greater loss per cell division is more likely to occur.
For this reason they show much greater persistence through cell division [ 21, 22] and consequently their frequencies are believed to integrate the effect of chronic exposure [ 23- 25].
One possibility is that taller people may have longer intestines (Hirsch et al, 1956) and have a greater rate of cell division within the tissue (Albanes and Winick, 1988); thus, more colon cells may be at risk.
The LSBD1 tumour has a doubling time of about 2 days, whereas that of the mesothelioma xenograft was 15 days (Cramers et al, 2003); a greater rate of cell division giving rise to a faster cellular uptake.
Prior to root hair outgrowth, root epidermal cells in the H position can be distinguished from those in the N position by many visible cellular features, including a greater rate of cell division (Berger et al., 1998), reduced cell length and vacuolation (Dolan et al., 1994; Galway et al., 1994), and enhanced cytoplasmic density (Dolan et al., 1994).
The regulation of microtubule dynamics has been shown to be both of great biological significance during cell division, and of outstanding pharmaceutical value in tumor therapy.
Intuitively, cancer incidence should increase with greater numbers of cells at risk, with greater numbers of cell divisions, and with higher mutation rates.
The high correlation between SAC stringency and species body size suggests that the SAC is more relevant to organisms that require a greater number of cell divisions, i.e., organisms with large body size.
Cells were first treated with cephalexin prior to FRAP analysis in order to block cell division for greater spatial resolution.
