HSPCs in the SVF originated in the BM. (A) Experimental scheme. After lethal irradiation, the mice underwent transplantation with 5 × 10⁶ GFP⁺ BM (BMT) cells. At 16 weeks after transplantation, the SVF was sampled and analyzed. (B) CFC assay of SVF from GFP⁺ BMT mice. Representative colonies were viewed by bright field, phase-contrast, and fluorescence, and then merged. Scale bars, 100 μm. (C) The colonies were classified and counted by morphologic criteria.