FIG. 5.
Effect of the addition of DCMU and DBMIB on the GS activity of Prochlorococcus strain PCC 9511. Samples were taken at the indicated times from cultures with no addition (control, ▪) or after 0.3 μM DCMU (●) or 0.06 μM DBMIB (▴) addition. Inhibitors were added at time zero. GS activity at time zero was 3.66 U · mg of chlorophyll−1.