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Growth of E. coli murQ mutant TJ2 and this mutant containing pHB2982 (TJ2/sll0861), pHB2993 (TJ2/mlla-1), or pHB3908 (TJ2/sll0861′) in minimal medium A supplemented with MurNAc. Growth in liquid medium at 37°C was monitored by determining the turbidity (optical density at 600 nm [OD600]) at zero time (open bars), 48 h (light gray bars), and 96 h (dark gray bars).
