Time course of CFU production in long-term cultures initiated with BM CD34⁺ cells isolated in subcompartments of G₀ /G₁ phase. Data are from one representative experiment of a total of three. Cells with indicated phenotype were cultured for 7 weeks in complete medium supplemented with IL-3-IL-6-SCF. Every week, CFUs were enumerated in HPC assays. The number of CFUs (×10³) per 10⁴ initial cells plated are shown above for each time point.