Figure 2

Growth curves and supernatant fluorescence of Synechocystis cultures. Growth curves (circles with solid line) and supernatant fluorescence intensity (squares with dashed line; excitation: 620 nm, emission: 650 nm), representing leaked phycocyanin, of Synechocystis/pKT230 (A and B) and Synechocystis/pKTLYS (C and D). The cells were grown under either continuous red-light illumination (A and C) or under red light for 84 hours followed by simultaneous red- and green-light illumination (B and D).