FIG 6.

Phylogenetic tree of IscB proteins encoded by the ISC transposons. The unrooted maximum-likelihood phylogenetic tree was constructed using the FastTree program from a multiple-sequence alignment built for a nonredundant set of 443 full-size IscB sequences and containing 207 informative positions. The tree is shown schematically; the complete tree is available in Fig. S8 in the supplemental material. The ISC transposons described in this work are mapped to the respective collapsed branches. The FastTree program was also used to compute bootstrap values indicated for the branches with more than 70% support.