Figure 3.

Alignment of variable amino acid positions within SRV-2 env sequences. This column alignment presents only those amino acid positions that vary in one or more of the twenty-one SRV-2 env sequences analyzed; exact position within the complete env sequence (Figure 2) is indicated at the bottom of each column. The analogous amino acid positions of the closely related SRV-1 and SRV-3 sequences are shown for comparison. The macaque species, origin and RF status for each SRV-2 isolate are indicated on the right. Colored residues indicate the amino acid groupings upon which the phylogenetic analysis is based. Non-conserved amino acid variants are shaded (magenta). (Mne) Macaca nemestrina, (Mni) Macaca nigra, (Mfa) Macaca fascicularis, (Mmu) Macaca mulatta.