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Homing of endothelial progenitor cells after MNC therapy in apoE KO mice. Photomicrographs are typical aorta cross-sections stained for the markers Flk-1 (vascular endothelial growth factor receptor) and CD133 (hematopoietic stem cell antigen) showing an intense immune reaction (red precipitate) in MNC-treated animals. (original magnification × 20. Bar: 50 μm).
