Figure 2.

Evolutionary relationships obtained for class I LysRS in the context of the sequences of all other class I aaRS. The analyses of five species that contain a class I lysS gene are shown. Numbers at branches correspond to bootstrap frequencies obtained from 100 replicates. (Top) Tree obtained with A. fulgidus class I aaRS sequences. (Middle) Tree obtained with class I aaRS sequences from B. burgdorferi, T. pallidum, and P. horikoshii (bootstrap frequencies correspond to the tree obtained with T. pallidum sequences). (Bottom) Tree obtained with M. jannaschii class I aaRS sequences.