Figure. Phylogenetic tree based on the envelope (E) protein gene of selected Japanese encephalitis virus strains. Murray Valley encephalitis virus (MEV) E gene (in boldface) was used as an outgroup. Genotypes are indicated on the right. The 2 bat virus isolates used in this study are indicated by shading. Scale bar indicates number of nucleotide substitutions per site. See Table 1 for more details of the strains used in this analysis and their GenBank accession numbers.