Figure 5From: Genetic and phylogenetic evolution of HIV-1 in a low subtype heterogeneity epidemic: the Italian exampleEvolution pattern of the V3 loop. The percentage of synonymous and non-synonymous substitutions in each of the 35 codons of the V3 Loop are indicated, together with the percentage of amino acid residue preservation at the specific position. The positions where the residue is found in < 80% of the sequences, are highlighted with light-gray boxes.Back to article page