Representative Prussian blue-stained FE-Pro-labeled cells. (A) Unlabeled LADMACs, (B) labeled LADMACs, (C) unlabeled splenocytes, (D) labeled splenocytes, (E) unlabeled CD34⁺ cells, (F) labeled CD34⁺ cells, (G) unlabeled mesenchymal stem cells × 40, and (H) labeled mesenchymal stem cells. All labeled cells were incubated with 50:3 μg/mL of FE-Pro. Splenocytes and CD34⁺ cells were stained with DAB-enhanced Prussian blue. Scale bar represents 10 μm.