CFU-S numbers are elevated in Slug^−/− mice. (A) The frequencies of LSK cells as a percentage of total spleen mononuclear cells in Slug^+/+ mice, Slug^+/− mice, and Slug^−/− mice. (B) Numbers of BM-derived and spleen-derived day 16 CFU-S colonies in Slug^+/+, Slug^+/−, and Slug^−/− mice. For CFU assays, BM cells or spleen cells (8 × 10⁴) were injected into lethally irradiated mice. Data are mean ± SD (n = 3 per group). ^#P > .05, *P < .05, and **P < .01 (Slug^−/− or Slug^+/− vs Slug^+/+).