Fig. 4From: Improving l-serine formation by Escherichia coli by reduced uptake of produced l-serinel-serine influx was assayed in E. coli ES and single-gene knockout mutants. The data represent the means ± SDs from three measurements. ES represents the parental strain. ES-1: ES ΔsdaC; ES-2: ES ΔcycA; ES-3: ES ΔsstT; ES-4: ES ΔtdcCBack to article page