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Concentrations of free amino acids during growth of NZ131 (open symbols) and NZ131 rgg::ermAB (closed symbols) with THY. (A) Percentage of the initial concentrations of serine (Ser) and asparagine (Asn) present in sterile culture filtrates. (B) Concentrations of arginine (Arg) and ornithine (Orn) in sterile culture filtrates.
