Figure 5From: Inactivation of uptake hydrogenase leads to enhanced and sustained hydrogen production with high nitrogenase activity under high light exposure in the cyanobacterium Anabaena siamensis TISTR 8012Effect of HupS inactivation on the sustainability of hydrogen production and nitrogenase activity. Comparison of hydrogen production (A) and nitrogenase activity (B) between wild type and ∆hupS strains of Anabaena siamensis TISTR 8012 was done after growth in BG110 medium for 4 days at 40 μEm-2s-1. The collected cells were determined for hydrogen production and nitrogenase activity after incubation for various times under continuous illumination of high light intensity at 200 μE m-2s-1 and anaerobic condition. Means ± S.D. (n=3).Back to article page