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Production of ergothioneine over time in the production strain with or without transporter in different media compositions. (A,D) Glu: SC + 40 g/l glucose, (B,E) AA: SC + 40 g/l glucoe + 1 g/l His/Met/Cys, (C,F) AA2: SC + 40 g/l glucose + 2 g/l His/Cys/Met.
