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Representative flow cytometry histograms of ECs and EOCs treated with TNFα. Shaded histograms indicate samples stained with the multicolor antibody mixture, whereas the open histograms are the corresponding unstained or fluorescent-minus-one controls. EOCs exhibit the typical EC surface markers and are negative for the leukocyte marker CD45. ECs, endothelial cells; EOCs, endothelial outgrowth cells; TM, thrombomodulin; TNFα, tumor necrosis factor α.
