Figure 7. Total CFU decrease as mice age. BM was isolated from at least 3 male ICR or p44 mice a 10, 16, or 20–24 months and 2 × 104 cells were plated on MethoCult (StemCell Technologies). Colonies, defined as a cluster of at least 30 cells, were counted on Day 7. Results are mean ± SE (n≥3).