Unrooted phylogenetic trees showing the relationships amongst HEV-A isolates using the different genomic regions. The neighbour-joining trees were constructed from alignment of the 5' UTR (a), P1 (b), P2 (c) and P3 genomic region (d), respectively. The percentage of bootstrap replicates supporting the trees are indicated at the nodes. The branch lengths are proportional to the genetic distances corrected using Kimura-two-parameter substitution model.
Yoke-Fun and AbuBakar BMC Microbiology 2006 6:74 doi:10.1186/1471-2180-6-74