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AMB Express
Fig. 5 | AMB Express

Fig. 5

From: Improvement of putrescine production through the arginine decarboxylase pathway in Escherichia coli K-12

Fig. 5

Effects of promoters of speAB and desensitized argA on putrescine production. A Bacterial cell growth and B putrescine concentration in the supernatant of strains KT37 (lacI promoter, closed triangle), KT38 (lacIq promoter, open circle), KT39 (lacIq1 promoter, closed square), and KT148 (T5 promoter, open diamond) grown in LB medium supplemented with 100 μg/mL of ampicillin. When the OD600 reached 0.4, 0.02 mM IPTG was added. Data shown are averages ± standard deviations, and culture experiments were performed in triplicate

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