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COS-7 cells expressing PvDBPII as a GFP fusion protein were incubated with immune plasma and then RBC expressing the FyA (A) or FyB (B) Duffy blood group antigen were added. The inset shows that FyA RBCs (A) gave smaller rosettes than FyB RBCs (B) in the COS-7 cell–RBC binding assay. Statistical testing and p values as explained in Figure 6B.
