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V3-directed antibodies are present in practically all HIV-1 infected patients and in individuals vaccinated with gp120. The levels of maternal V3-directed antibodies were recently shown to correlate with reduced mother to child transmission, and V3 IgGs were found to be a negative correlate of risk in the RV-144 human trial. mAb directed to the tip of the V3 are capable of broad neutralization of...
Synthetic peptides offer an attractive option for development of a V3-directed vaccine. However, immunization with flexible linear peptides may result in an immune response to multiple conformations, many of which differ from the native conformation of the corresponding region in the protein. Here we show that optimization of the location of a disulfide bond in peptides constrained to mimic the β-hairpin...
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