Fig. 4

Production of phenazines by the parent strain and genome-reduced mutants. Production of PCA, 2-OH-PCA, and 2-OH-PHZ by the parent strain GP72(rpeA-) and its mutants after 24 h of fermentation in KMB medium at 28 °C and 180 rpm. The phenazines were extracted and measured by HPLC at a wavelength of 254 nm. The bar indicates the group mean and the error bar indicates SD from triplicate experiments