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Fermentation characteristics of the engineered strain and the control Y.L-1 strain using a 50 L bioreactor for β-carotene production. (A) Fed-batch bioreactor fermentation of the engineered strain for 120 h. (B) Fed-batch bioreactor fermentation of the control Y.L-1 strain for 144 h. Error bars represent standard deviations (n = 3).
