Histidine Regulation in Salmonella typhimurium

There is only one species of histidine-specific transfer RNA detectable in Salmonella typhimurium. Its sequence is -G-G-U-G-G-C-U-A-Us4-A-G-C-U-C-A-G-D-D-G-G-D-A-G-A-G-C-C-C-U-G-G-A-U-U-G*-U-G-Am2-ψ-ψ-C-C-A-G-U-U-Gm7-U-C-G-U-G-G-G-T-ψ-C-G-A-A-U-C-C-C-A-U-U-A-G-C-C-A-C-C-C-C-(C)-A. Escherichia coli produces a histidine tRNA with an identical sequence. The presence of the C in parentheses is uncertain from our analysis. G* is probably identical with the modified G found in the analogous position in E. coli tyrosine tRNA.