Fig. 4

Effects of typical chemicals on promoter strength. The fluorescence strength of promoters in the medium with different additives at various culture stages. The X-axis denotes the additive components, which are listed in the red box in an enlarged manner. The Y-axis represents the genes corresponding to the promoters, which are listed in the green box in an enlarged manner. The five graphs represent different growth stages and their corresponding fluorescence levels (maximum (Green) and minimum (Red)). a: Early log phase (109307, 4374); b: Post log phase (56675, 4351); c: Early stationary phase (286247, 4796); d: Middle stationary phase (294678, 5560); e: Post stationary phase (300788, 7317)