Figure 4. Phylogenetic analysis of A) the complete capsid protein (ORF2) and B) part of the polymerase protein (about 300 amino acids in the C-terminal part of ORF1b) of the astrovirus family.

The trees were constructed by the neighbour-joining method using the Jones-Taylor-Thornton matrix-based model of amino acid substitution. Bootstrap values (>70%) from 1000 replicates are shown. Both trees are plotted to the same scale. The novel isolates are indicated by bold lettering. The viruses marked with ▾ do not harbour s2m.