Fig 3.

Amino acid sequence comparison of the Env gp120 V1V2, C3, and V4 regions of SHIVC109P3, SHIVC109P3N, and SHIVC109P4. Dots denote identical residues in the sequence, and PNGS in the reference ZM109F.PB4 sequence are highlighted by red boxes. Deletions of PNGS are indicated by dashed red boxes, while those that are shifted are bracketed in blue. Arrows mark the borders of the loop regions, and the numbers of clones matching the indicated sequences per total number of clones sequenced are given in parentheses. The numbering of amino acids is based on that in the HXBc2 subtype B reference strain.