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Figure 2 | Biology Direct

Figure 2

From: Lateral transfer of tetrahymanol-synthesizing genes has allowed multiple diverse eukaryote lineages to independently adapt to environments without oxygen

Figure 2

A maximum-likelihood phylogeny based on the sequences of oxidosqualene cyclase (OSC), squalene-hopene cyclase (SHC), and squalene-tetrahymanol cyclase (STC) from a broad range of organisms. The STC clade is shaded. The tetrahymanol-synthesizing bacteria Rhodopseudomonas palustris strain TIE-1 and Bradyrhizobium japonicum are marked with an asterisk (there is no data whether R. palustris strain BisA53 produces tetrahymanol or not). Bootstrap probabilities are shown for nodes with support over 50%. Thick branches represent nodes supported by Bayesian posterior probabilities over 0.95. Ferns and pezizomycete fungi likely acquired the SHC genes from a cyanobacterium and Anaeromyxobacter via lateral gene transfer, respectively, while the OSC genes of the few bacteria are of possible eukaryotic origin.

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