Fig 4.

Growth and extracellular l-lactate formation in wild-type Synechocystis and in two of the engineered derivatives. Cells were grown in plain BG-11 medium under white-light illumination (30 μE/m²/s). Filled symbols represent the OD₇₃₀; open symbols represent the lactate concentration. The wild type is represented by circles; SAA015, the strain with integrated B. subtilis ldh, is represented by squares, and SAA017, the strain with integrated B. subtilis ldh and P. aeruginosa sth, is represented by triangles. Values are the averages for biological replicates; error bars indicate the standard deviations (n = 3); if an error bar is not visible, it is smaller than the respective data point symbol.