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Enzyme immunoassay of strains. WT (AJW678; open columns), rcsB mutant (AJW2143; striped columns), and rcsC mutant (AJW2144; filled columns) cells were harvested in stationary phase after growth in pH 7.0 and 5.5 LB media with either 90 mM or 490 mM NaCl. Optical densities at 492 nm (OD492) were determined. The mean values ± standard deviations for two separate runs are indicated.
