FIG. 1.

Phylogenetic tree constructed on the complete nucleotide sequences of 70 HBV isolates of genotype B and 15 isolates representative of genotypes A, C, D, E, F, and G. Bootstrap values are shown along each main branch. The length of the horizontal bar indicates the number of nucleotide substitutions per site. Countries of origin are indicated for genotype B, and accession numbers are shown after a slash for isolates the sequences of which have been deposited in DNA databases. Isolates in boldface were sequenced in the present study.