Fig. 3From: Comprehensive identification and characterization of the HERV-K (HML-9) group in the human genomePhylogenetic analysis of the HML-9 near-full-length proviruses, solo LTRs, and 4 subregions by the maximum likelihood method. Phylogenetic analyses of 5 HML-9 proviral elements (A), 44 solo LTRs (B), 10 gag elements (C), 8 pro elements (D), 11 pol elements (E), and 13 env elements (F), together with references. The two intragroup clusters of the pro and pol genes (types a and b) were annotated and depicted with brown and orange background colors, respectively. The resulting phylogeny was tested by the bootstrap method with 500 replicates. The branch length indicates the number of substitutions per siteBack to article page