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β-galactosidase assays are performed with strains ω8320 (WT), ω9369 (Δcrp) and ωA145 (CRP box*). All strains were harvested at the beginning of the stationary phase, except for “expo”, harvested at mid exponential phase growth. Bacteria were grown in Tryptone medium (Tryptone) or in LB, with high NaCl concentration (LB + NaCl) or without NaCl (LB - NaCl).
