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. 2005 May;187(9):3088–3099. doi: 10.1128/JB.187.9.3088-3099.2005

FIG. 7.

FIG. 7.

Weak acids render ppk mutants peroxide sensitive. Cells pregrown to stationary phase were spread (0.05 ml) onto NCE glucose plates containing the indicated concentration of sodium benzoate. Filter disks containing 5 μl of a 8.8 M peroxide solution were added and the plates grown for 2 days at 37°C.