Figure 2.

ML phylogenetic tree of SF1 helicases. Clades corresponding to different families within SF1 are shown with different colors. The arrangement of the genes encoding PIF1 helicase and pDNAP in Polinton 2-HM is shown next to the corresponding branch. Numbers at the branch points represent the Bayesian-like transformation of aLRT (aBayes) local support values (Supplementary Figure S3 shows the SF1 helicase tree with the bootstrap support values). The scale bar represents the number of substitutions per site. Abbreviations: PLV, polinton-like viruses (ACE, from ACE Lake; RED, Red Sea; MED, Mediterranean Sea; INO, Indian Ocean; SPO, South-Pacific Ocean; YSL, Yellowstone Lake); HM, H. magnipapillata; TV, transpoviron.