Lin– c-Kit+ Sca-1+ (LKS+) cells, and all their containing subpopulations: long-term-HSCs (LT-HSCs) and multipotent progenitors (MPP2, MPP3 and MPP4), substantially increased in the bone marrow of mice 7 days after the PCA2-infection (Figure 3A). The gene discussed is KIT; the disease is infection.