FIG. 1.

Alignments of the putative protein sequences of the env V3 loop region of the 42 sequenced Colombian HIV-1 strains. Dots indicate identity to the consensus sequence generated from these 42 sequences, as indicated, and dashes indicate gaps in alignments. The cysteines framing the V3 loop are identified by the light gray shaded box. The potential N-linked glycosylation site is identified by the gray shaded box. The crown sequence, GPGR, is indicated by the dark gray box. The positions of acid residues, associated with binding to CCR5, are identified by the colorless boxes (positions 11 and 25).