Individual repopulating kinetics of clonally derived HSCs. Shown are the percent donor-type cells in blood at the indicated time points after the clones received injections. (A) Fifty-seven clonal HSCs isolated after in vitro LD. All clones (repopulated mice) obtained by this approach in our lab that yielded at least 7 months of data are shown (a few clones have been described previously^4,13 ). (B) The mean repopulation curve (± SD) of all clonal curves. The arithmetic mean of the data in Figure 1A is shown for each time point.