FIG. 3.

Proximity of tRNA genes to glutamyl-tRNA synthetases. The gltX loci reported for 29 bacterial species were examined for the presence of adjacent tRNA genes; accession numbers are indicated. Species containing tRNAs adjacent to gltX are shown. Open arrows represent GltX, and solid arrows represent tRNA with amino acids and anticodons, as indicated. Species lacking tRNAs adjacent to gltX included the following, with accession numbers: Aquifex aeolicus, AE000657; Azospirillum brasilense, X99587; Bacillus stearotherophilus, M55072; B. subtilis, AL009126; Borrelia burgdorferi, AE00783; Chlamydia psittaci, U41758; Chlamydia trachomatis, AE001273; Helicobacter pylori, AE001439; Methanobacterium thermoautotrophicum, AE000666; Methanococcus jannaschii, L77117; Mycoplasma genitalium, L43967; Mycoplasma pneumoniae, U00089; Mycoplasma pulmonis, L25415; Neisseria gonorrhoeae, U76418; Pyrococcus horikoshii, pyro_h; R. meliloti, M27221; Rickettsia prowazekii, AJ235269; Staphylococcus xylosus, Y07614; Streptococcus coelicolor, AL031124; Synechocystis sp., AB001339; T. thermophilus, X64557; Treponema pallidum, AE000520; Vibrio cholerae, AF030977.