Accumulation of immature progenitor cells in the fetal liver of c-myb^KD/KD embryos. Presented are fluorescence values (log-scale) from flow cytometric analyses of fetal liver single-cell suspensions from E13 c-myb^+/+ and c-myb^KD/KD embryos stained with monoclonal antibodies. Gated live cells are shown. (A) Cells were stained with α-CD71(FITC) and α-TER119(APC). (B-C) Cells were stained with α-CD71(FITC), α-c-Kit(PE-Cy5), and either α-CD45(APC) (B) or α-CD34(PE) (C). Gated c-Kit⁺ cells are shown.