Fig. 3

The riboflavin production performance is examined in flask fermentation at 48Â h, within strains overexpressing specific genes from the synthetic operon. (A) Riboflavin production within strains overexpressing individual genes from the synthetic operon. (B) Riboflavin production when strains overexpress ribA in conjunction with the remaining four genes of the synthetic operon. (C) Riboflavin production within strains where four out of the five genes from the synthetic operon are co-overexpressed