A) The number of Hspa9+/− CFU-PreB colonies counted on day 7 were significantly reduced compared to colonies from Hspa9+/+ littermate bone marrow at all ages evaluated. B) Representative images of CFU-PreB colonies. Percentage of bone marrow cells that are common lymphoid progenitors (C) and Hardy fractions (D) were not significantly different between Hspa9+/− and Hspa9+/+ littermate mice at 4–5 months of age. (Hspa9+/+, filled circles; Hspa9+/−, open circles) CLP, common lymphoid progenitor. Statistical analysis by two tailed Student’s t-test. *p<0.05, **p<0.01, ***p<0.001