Fig. 5. (a) Schematic representation of the SD sequence on mRNA pairing with the aSD sequence on the SSU rRNA. (b–d) The free 3′ end of SSU rRNA (b), the frequency distribution of 4577 putative matches of at least four bases between the rRNA 3′ tail and the upstream 30 nt of coding sequences (c), and the number of times each nucleotide site at the rRNA 3′ tail participated in the SD–aSD matches (d).
