Fig. 3.
Three clones of CHO cells expressing 3 levels of human CD38 as analyzed by flow cytometry using an anti-CD38 antibody conjugated to FITC.
The clones express (A) low, (B) medium, and (C) high levels of human CD38. Empty histograms indicate isotype control; filled histograms, cells stained with a CD46-FITC antibody. M1 indicates difference in median fluorescence.