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We previously reported that an envelope (Env) glycoprotein immunogen (o-gp140ΔV2SF162) containing a partial deletion in the second variable loop (V2) derived from the R5-tropic HIV-1 isolate SF162 partially protected vaccinated rhesus macaques against pathogenic SHIV SF162P4 virus. Extending our studies to subtype C isolate TV1, we have purified o-gp140ΔV2TV1 (subtype C ΔV2 trimer) to homogeneity,...
HIV envelope glycoprotein (Env) is the target for inducing neutralizing antibodies. Env is present on the virus surface as a trimer, and, upon binding to CD4, a cascade of events leads to structural rearrangement exposing the co-receptor binding site and entry into the CD4+ host target cells. We have designed monomeric and trimeric Env constructs with and without deletion of the variable loop 2 (ΔV2)...
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