Fig. 6.

PxxP motifs occur at a level expected by chance in the HVR. For each genotype, the figure shows the ratio of the number of PxxP motifs in the HVR compared with the number expected by chance for a peptide of the same amino acid composition and length. Sequences comprised epidemiologically unlinked sequences from genotype 1 (n = 18), genotype 2 (n = 1), genotype 3 sequences with (type 3I, n = 42) and without (type 3N, n = 38) a duplicated region, genotype 4 (n = 15) and divergent types from wild boar (n = 2) and genotype 3 sequences from rabbits (n = 3).