Macrophage-tropic human immunodeficiency virus isolates from different patients exhibit unusual V3 envelope sequence homogeneity in comparison with T-cell-tropic isolates: definition of critical amino acids involved in cell tropism.

Abstract excerpt

Previous experiments indicate that the V3 hypervariable region of the human immunodeficiency virus (HIV) envelope protein influences cell tropism of infection; however, so far no consistent V3 sequence can account for macrophage or T-cell tropism. In these experiments, we studied infectious recombinant HIV clones constructed by using V3 region sequences of HIV isolates from 16 patients to search for sequences...

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