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Fig. 3.
2ß1hi/CD133 population have a high proliferative potential in vitro. (A) Basal cells with the phenotypes
2ß1hi/CD133+ and
2ß1hi/CD133- were plated onto type I collagen plates and the colony forming efficiency (CFE) determined. Cells were counted before the addition of irradiated feeders and were cultured for up to 28 days. Controls (basal cells) were plated with no pre-selection. Colonies containing 32 or more cells were scored. CFE was calculated as the number of colonies formed per number of selected cells x100. CFEs are expressed as the ratio of the selected population to control (unselected basal cell) population. Results show means ± s.e.m. of four experiments. (B) Long-term proliferative potential of
2ß1hi/CD133+ and
2ß1hi/CD133- cells. 5x103 cells were seeded onto type I collagen plates, in triplicate, and the total cell output was determined at the end of the serial culture when their growth capacity was exhausted. Results show means ± s.e.m. of four experiments. P<0.05.