CXCR4-GFP cells in the general periphery and in the dorsal funiculus express markers of hematopoetic lineage and not neural lineage. At 5 weeks (a, d) and at 2 weeks (b-c, e-f), the putative migrating cell populations are positive for both CD11b and NG2 identifying them as presumptive macrophages. No CXCR4-GFP cells colocalized with either GFAP or Nestin. Scale bars: d: 50 μm. [red:CD11b(a-c), NG2(d-f), GFAP(g-i), Nestin(j-l), green:CXCR4-EGFP, blue:Hoechst].