Expression of CD127 (IL-7Rá) in the bone marrow. BALB/c bone marrow leukocytes were stained with either PE-conjugated rat IgG2b, κ isotype control mAb A95-1 (Cat. No. 553989, left panel) or PE-conjugated mAb SB/199 (right panel) and a cocktail of FITC-conjugated antibodies to the lineage markers CD3e (mAb 145-2C11, Cat. No. 553061/553062), CD8a (mAb 53-6.7, Cat. No. 553030/553031), CD11b (mAb M1/70, Cat. No. 557396/553310), CD19 (mAb 1D3, Cat. No. 557398/553785), CD45R/B220 (mAb RA3- 6B2, Cat. No. 553087/553088), and Ly-6G and Ly-6C (mAb RB6-8C5, Cat. No. 553126/553127). Flow cytometry was performed on a BD FACSCalibur™ Flow Cytometry System.