Figure 8

Neighbor-joining phylogeny based on ORF1 Type I domains. The ORF1 of CR1 group 3 sequences cluster with those of L2 group 2, suggesting that this type of ORF1 may have been horizontally acquired across lineages. The phylogeny was estimated using MEGA 6 [20] and inferred using the JTT substitution matrix. The robustness of the nodes was estimated by 1,000 bootstrap replicates. Only bootstrap values for major groups are shown.