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—Maximum likelihood phylogeny of 453 single-copy orthologous protein coding genes from eight supergroup A and two supergroup B strains. Codon-based nucleotide alignments were concatenated, producing an alignment of 375,105 sites. The general time reversible base substitution model (GTR+F+R2) was used to estimate the phylogenetic tree, with support by 1,000 bootstrap repetitions. Only bootstrap values >50% are shown. The scale bar represents the number of substitutions per site.
