309307.fig.004a
(a)
309307.fig.004b
(b)
Figure 4: Flow-cytometry analysis of U-87, A-549, A-498, HeLa, and CaSki cell lines immunostained with the MAbs: (a) 15A4 (IgG2a subtype) (black line); (b) 1D5 (IgG2a subtype) (black line); irrelevant MAbs of IgG1 or IgG2a subtypes were used as negative control (gray line).