FIG. 3.

Substitutions of amino acids in the jacalin-selected SIV population cluster in the potential O-linked carbohydrate attachment site. Envelope sequences were amplified from viral RNA, and 20 clones were sequenced. Five clones representative of the population are shown. The predicted O-linked glycosylation site (amino acids 128 to 139) in gp120 is boxed. The gp120 variable regions (V1 to V5), the junction between gp120 and gp41, and the transmembrane domain (TM) are also indicated. Amino acids in the jacalin-selected virus population that are the same as those in the parental SIVmac239 strain are shown as periods. Dashes indicate deletions. Asterisks represent stop codons.