Distribution of various progenitor cell types between the different phases of the cell cycle.

CD34⁺ CB cells were cultured (as described in the legend to Figure 1) and the distributions of total cells and LTC-ICs (n = 9), CFCs (n = 8), and CD34⁺ cells (n = 5) between G₀/G₁ (■) and S/G₂/M (▪) determined (A). (B) Corresponding distributions of these cells (except for those expressing CD34) between G₀ (■) and G₁ (▪) (n = 3).