FIG. 5.

Maximum likelihood phylogenetic analysis of tyrosyl-tRNA synthetase (TyrS) (A), phosphoribosylformylglycinamidine cyclo-ligase (PurM) (B), and trifunctional purine biosynthetic protein (PurN) (C). Amino acid sequences obtained in this study are underlined. A “W” after the name indicates sequences obtained from deep-sea clones, and an “S” after the name indicates sequences obtained from soil clones. The analysis was performed on 220 (A), 262 (B), and 125 (C) unambiguously aligned amino acid positions. Numbers near nodes indicate bootstrap values (only bootstrap values of ≥60 are shown).