Figure 2.

Expansion of total cells, CFC, LTC-IC, and CRU in cultures of Sca-1⁺lin⁻ marrow cells stimulated in vitro by 100 ng/ml IL-11, 100 ng/ml FL, and 50 ng/ml SF for 5 (open bars, n = 2 experiments), or 9–10 days (hatched bars, n = 5–7 experiments). The fold increase (±1 SEM) was calculated by dividing the number of progenitors detected in the 5- or 9- to 10-day cultures by the corresponding number of progenitors calculated to be present in the cells used to initiate each culture. (Data include 1 experiment not described in Table 1.)