Fig. 5
From: Utilization of rare codon-rich markers for screening amino acid overproducers
The amino acids produced by the wild-type and the mutated strains. a l-leucine productions of E. coli mutants selected by the leucine rare codon-rich kanR. b l-arginine productions of E. coli mutants selected by the arginine rare codon-rich kanR. c l-serine productions of E. coli mutants selected by the serine rare codon-rich specR. d l-arginine productions of C. glutamicum mutants selected by the arginine rare codon-rich kanR. Values and error bars represent the mean and the s.d. (n = 3). **P < 0.01, ***P < 0.001 as determined by two-tailed t test
