Immunofluorescence staining of human Flk1⁺CD31^–CD34^––derived endothelial cells. (A) Deparaffinized section of small intestine was stained with antimouse VWF antibody (original magnification × 200). (B) Small intestine was stained with antimouse VWF antibody, antihuman VWF antibody, or antihuman CD45 antibody. Confocal microscopic images of antimouse VWF (blue), antihuman VWF (green), and antihuman CD45 (red) are shown (original magnification × 200). A 20×/0.40 objective lens was used.