Flow cytometric characterization of U937 cells.

<p>Cells were stained (A) with fluorescently labelled antibodies against cell surface Fcγ receptors (CD16, CD32, CD64), complement receptors (CD35, CD11b, CD11c) and LPS coreceptor CD14; (B) with vital dye Celltracker green. Grey histograms indicate autoflourescence, dashed lines show histograms of isotype control antibody stained cells and solid lines stand for signals obtained by receptor specific antibodies or by CMFDA labeling.