Fig. 4From: Metabolic pathway engineering using the central signal processor PII Concentration of metabolites of strain BW86 relative to that of wild-type Synechocystis sp. PCC 6803. Only those metabolites are shown whose levels in the two strains differed. Cells were grown in BG-11 medium with nitrate to an OD750 of 0.8; n = four independent replicates. The method does not distinguish between citrate and isocitrate. Note that the x-fold differences in concentration are on a log 10 scaleBack to article page