TABLE 2.

Effect of a cepR mutation on siderophore, protease, and lipase production^a

Strain	Genotype	Supernatant CAS activity (A630/A600)	CAS agar zone diam (mm)	Ornibactinb (μg/ml/A600)	Salicylic acid (μg/ml/A600)	Protease zone radius (mm)	Lipase activity (U/ml/A600)
K56-2	Wild type	1.74 ± 0.30	9.5 ± 0.5	49.8 ± 4.2	0.54 ± 0.10	5.67 ± 0.29	0.53 ± 0.02
K56-R2c	cepR::Tn5	2.47 ± 0.20c	13.7 ± 0.3c	83.1 ± 1.1c	0.49 ± 0.04	0c	0.29 ± 0.05c

^aAll values are means ± standard deviations of triplicate experiments unless indicated otherwise. 

^bMean ± standard deviation of duplicate experiments. 

^cSignificantly different from parent K56-2 in unpaired t test (P < 0.05).