Figure 2From: Modulation of HIV-1 macrophage-tropism among R5 envelopes occurs before detection of neutralizing antibodiesDetection of neutralizing antibodies present in the plasma of subjects who yielded gp120 sequences studied here. Serially collected plasma samples (heat inactiviated) were tested for neutralization of YU2 and HTLV-IIIB, a sensitive T-cell line adapted HIV-1 strain (left panels). The same plasma samples were tested for neutralization of viral clones carrying autologous gp120s from the early stages of infection (right panels). Missing arrows or bars means not tested.Back to article page