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Concentrations of free amino acids during culture of NZ131 (open symbols) and NZ131 rgg::ermAB (closed symbols) with CDM. (A) Percentage of the initial concentrations of serine (Ser) and asparagine (Asn) in culture filtrates. (B) Concentrations of arginine (Arg) and ornithine (Orn) in culture filtrates. The data shown are the means ± standard errors of the means obtained from two independent experiments.
