Distribution of HSC groups from different sources. The percent of clones of each type for each origin of HSC studied is shown. The kinetic families as defined in Figure 2 are shown on the horizontal axis. Here, the AUC subclassification was not used because of the low number of clones derived from in vivo LD (n = 27) and from purified HSCs (n = 13). Vertically, each bar represents the percent of kinetics that fall within the indicated family. (A) Comparison of HSC groups derived after in vitro and in vivo LD. (B) Comparison of groups derived from unpurified HSCs (data for in vivo and in vitro LD combined) and purified Lin^–Rho^–SP HSCs.