Fig. 4

Cell growth and l-ornithine production of the strains with changing RBS site and replacing start codon of argF. a Growth curves under 72 h of Shake flask culture. b l-Ornithine production at 48 h of incubation. The error bars represent the standard deviation of samples. Compared with the controlling strain CO. NS means not significant. **p ≤ 0.05 and ***p ≤ 0.001