Cloning and Expression of the γ-Polyglutamic Acid Synthetase Gene pgsBCA in Bacillus subtilis WB600

Figure 4

Production of γ-PGA in fermentation of recombinants (g/L). As increasing amounts of the substrate, glutamate, the production of γ-PGA was enhanced. However, when glutamate concentration was >50 g/L, the synthetic yield of γ-PGA declined.