FIG. 5.

Anti-gp41 IgG subclass profiles in the HC and CP groups. (A) The endpoint titers of IgG and IgG subclass antibodies to the gp41-N54 and gp41-SP400 peptides were assessed using plasma from 16 HC and 20 CP group members. Each symbol represents the titer for one individual; the horizontal bar is the median value for the group. Nonresponders (titers <1.0 × 10²) are shown in the gray shaded area of the plot. (B) Correlations between anti-gp41 IgG and IgG subclasses were investigated by Spearman's rank correlation.