Figure 4From: Stationary phase expression of the arginine biosynthetic operon argCBH in Escherichia coliEffect of astCADBE depleted arginine on argCBH expression in wild type, ΔrpoS, Δast ,and ΔrpoS Δast strains. Strains were grown in triplicate in LB rich media. Samples were taken in exponential phase (□, OD600 = 0.3) and stationary phase (■, OD600 = 1.5), and β-glactosidase activity was assayed as described in Methods.Back to article page