Fig. 2

Tyrosine production of plasmid-based engineered strains with rat phenylalanine hydroxylase. Strain YBR expressing the catalytic domain of RatPheH (RatPheHc), using glucose (A) or glycerol (B) as the carbon sources. Each of the transformants was cultured up to 48 h at 30 °C. Phe, black squares; Tyr, blue squares; OD, white circles. Data are presented as mean values with standard deviations for three independent experiments. Symbols without an error bar indicate that they are larger than the size of the error bar