Figure 1. Consensus secondary structures of the αr sRNA families. Color code for base pairs is that of the Vienna RNA web suite.¹² Putative Hfq-binding sites (Hfq) i.e., free 3′-hydroxyl end of an oligo-U stretch or internal single-stranded A/U-rich regions (Hfq) are marked with an arrowhead and a bracket, respectively. Ultraconserved anti Shine-Dalgarno sequences are indicated as (aSD), and identified sub-structural modules, suhB (RF00519) and αr35b, are marked with brackets.