Detection of clonogenic progenitors. (A-B) Detection of clonogenic progenitors from CD34⁺/CD99^low (□) and CD34⁺/CD99^high (▪) cells sorted from different apheresis samples (n = 6). (A) Detection of committed progenitors (BFU-Es and CFU-GMs). (B) Detection of immature clonogenic progenitors (CFU-GEMMs and HPP-CFCs). (A-B) Error bars represent SEM. (C) Scoring of CAFCs in limiting dilution analyses of CD34⁺/CD99^low (□) and CD34⁺/CD99^high (♦) cells (n = 3). Data are from a representative experiment.