Figure 6From: Extensive purifying selection acting on synonymous sites in HIV-1 Group M sequencesSequence motifs for the highly conserved regions with unknown specific function. The five regions with predicted functions and four regions with unknown functions found to be under strong purifying selection in HIV-1 genes. The range of coordinates on the HIV-1 genome for each motif is given in column 2. Numbers above each logo represent the degeneracy at each nucleotide site.Back to article page