Figure 6

Balanced production of proteins encoded by the rpsO-lacZ and pnp genes in hfq⁺and hfq^-backgrounds. PNPase and β-Galactosidase levels were determined by Western-blotting in the hfq⁺ and hfq Δ derivatives of strain IBrpsO188::lacZ, bearing the rpsO'-'lacZ chromosomal fusion (Materials and methods) and carrying plasmids pACYC184 (p) or its derivative pS15 expressing the rpsO gene.