Binding affinities (apparent KD) for a subset of BG18 type I BCRs to N332-GT5 and three potential boosting immunogens. Number and percent of binders are listed (G1:n= 8, G2:n= 14). Dotted line represents the LOD for this assay. Statistical significance (C and D) was tested between groups using unpaired two-tailed Mann-Whitney tests. See alsoFigure S11.