Table 4 Specific argininosuccinate lyase (ASL) activity in exponential culture of WT, rpoS^-, and ΔargR strains. Cultures were grown in M9 minimal media supplemented with 30 μM L-arginine and harvested at OD_{600 nm} = 0.3. Cell extracts were assayed as described in the Methods section. ASL enzyme assay values were corrected for the low background levels of non-specific activity in the argH^- mutant.

From: Stationary phase expression of the arginine biosynthetic operon argCBH in Escherichia coli