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Table 2 Genotypic determinants predicting coreceptor use by HIV-1 subtype D viruses

From: Genotypic prediction of HIV-1 subtype D tropism

Criteria observed in V3 No. of Bulk Sequences with the Indicated Phenotype (TTT)
11/25 Amino Acids Net charge R5 R5X4/X4
"R" or "K" at 11 < +5 0 0
  ≥ +5 0 2*
"K" at 25 < +5 4 1
  = +5 2 0
  > +5 0 0
"R" at 25 < +5 1 0
  ≥ +5 1 3*
No "R" or "K" at 11 or 25 < +6 14 0
  ≥ +6 0 0
  1. *The two viruses harboring an arginine at position 11 have also an arginine at position 25.