Fig. (6) (A) Expression of the λclpQ⁺::lacZ⁺ in HY20001 and expression of λclpQ^m2Δ40::lacZ⁺, with a 40 bp deletion in the internal leader sequences, in HY20019. (B) The northern blot of the mRNAs of these two fusion genes, using the 723 bp of lacZ⁺ as a probe.