FIG. 4.
Growth of E. coli KNabc/pAM2 and KNabc/pAM3 in LK medium. The E. coli strains KNabc/pAM2 (▴), KNabc/pAM3 (▪), KNabc/pSK+ (●), and DH5a/pSK+ (○) were grown in LK medium (pH 7.1) at 37°C in the absence (A) and presence (B) of 400 mM NaCl. Growth was monitored by measuring the optical density at 585 nm.