Detection of human hematopoi -etic precursors in mouse bone marrow and liver. BM, liver, and spleen (rows top to bottom, respectively) were examined from a mouse transplanted 68-days prior with human lineage-depleted fetal liver cells. Hematopoietic precursors were stained with CD34-PE-Cy7, CD38-PE, and CD133-APC. CD133 staining is indicated in red, highlighting a population of probable hematopoietic stem cells in the BM and liver with the phenotype CD133+CD38lowCD34++. All data were gated for PI–CD59+ events excluding mouse cells as shown in Figure 4.