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| Figure 1: Unrooted phylogenetic tree showing the evolutionary relationships of the hepatitis B virus strains described to date, including the new sequences isolated in the present study (HQ646059–HQ646098). The tree was constructed using the maximum-likelihood approach after alignment of 1200 nucleotides of the Pre-S1, Pre-S2 and S regions. The statistical support refers to 2.000 bootstrap replicates. |
