Long-term, multilineage, donor gfp peripheral blood engraftment. Peripheral blood mononuclear cells were analyzed by flow cytometry 3 months after transplantation. The first column is B cells expressing B220, the second column is macrophages expressing CD11b, and the third column is T cells expressing CD4. The top row is a C57BL/6 and the second row is a gfp donor strain for reference controls. The third row is a representative C57BL/6.gfp chimeric mouse. The fourth row is a representative iNOS.gfp, and the fifth row is a eNOS.gfp. The bottom row shows peripheral blood with circulating VEGFR2⁺ cells in C57BL/6.gfp, iNOS.gfp, and eNOS.gfp animals. Numbers in the top right corner are percentages of doubly lineage-stained and gfp⁺ cells. PB indicates peripheral blood.