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Differential expression of macrophage markers. Human monocytes were differentiated for 7 days in the presence of M-CSF or GM-CSF. Then, macrophage cultures were immunostained for the macrophage marker CD68 (green) and then stained for CD14 (red). Dual labeling demonstrated the presence of CD14 (B) on M-Mac without similar staining on GM-Mac (A). Similar results were obtained with two other monocyte donors. Scale bar = 10 μm (applies also to B).
