Growth curves of wild-type and transgenic Synechocystis. Cells were grown under mixotrophic conditions at (A) 30°C or (B) 20°C. Cultures were grown in BG-11 medium and bubbled with air under an illumination of 40 μmol photons/m2/s. The optical density of cells at 730 nm was measured at the indicated time points. Values are means ± SD (bars) of three independent experiments conducted on different days. Absence of a bar indicates that the SD falls within the symbol.