The actual binding of KIR2DL2 to CD4 + cells infected with the Vpu-Env V/V strain was confirmed using a KIR2DL2-IgG fusion construct.
Binding of a fusion construct of KIR2DL3 (an allele at the same locus as KIR2DL2) was not affected by the KIR2DL2-associated polymorphism.