RNA:RNA electrophoretic mobility shift assays confirming base-pairing between FasX and the 5′ end of (A) M2.113 mRNA in M2 GAS, (B) M6.tee6 mRNA in M6 GAS, and (C) M28.fctA mRNA in M28 GAS. A biotin-labeled RNA probe was incubated with wild-type FasX (FasX RNA; lanes 2–4 and 6–9), a FasX mutant in which six of the complementary nucleotides had been deleted (FasXΔ72–77 RNA; lane 5), unlabeled RNA probe (lanes 6–8), or unlabeled yeast tRNA (lane 9).