Comparison of the structures of (a) tRNA, (b) mRNA and (c) tmRNA. (a, c) The 3' and 5' termini, the amino acid acceptor stem (AC) and the anticodon (A), D and T arms are indicated. (b, c) The Shine-Dalgarno sequence (SD), the start codon (s) and the stop codon (octagon), the locations of the tRNA-like (TLD) and mRNA-like domains (MLD) as well as pseudoknots (pk) 1 to 4, helix 5 (h5), and the +1 resume codon (r) are indicated. The thin arrows depict the pseudoknot connections.
Wower et al. Journal of Biology 2008 7:17 doi:10.1186/jbiol78