Spontaneous reversion of human immunodeficiency virus type 1 neutralization-resistant variant HXB2thr582: in vitro selection against cytopathicity highlights gp120-gp41 interactive regions.

Abstract excerpt

Spontaneous revertants of the immune-selected variant HXB2thr582, which resists neutralization by certain conformationally dependent antibodies specific for the CD4-binding site on gp120 (such as F105), appeared after long-term culture in the absence of immune-selecting serum. Molecular analysis showed some of the viruses in the revertant stock contained a simple back mutation, whereas others retained the Thr-582...

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