Figure 3

Detection of SsrA^Hpexpressed in H. pylori and from plasmids in E. coli. A SsrA^Hpriboprobe was used to perform northern blots and detect the SsrA^Hpmolecule in H. pylori and in E. coli wild type or ΔssrA mutant strains. Pre-SsrA^Hpindicates a band with the size of non-maturated precursor of SsrA^Hp. A faint band marked by a star corresponds to cross-hybridization with the SsrA^Ecthat is, as expected, absent in the E. coli ΔssrA mutant.